Why is resize2fs misreading the number of blocks in my partition?

I'm trying to shrink a partition to match the size of another partition on another drive. I heard that I first have to shrink the filesystem to match. I am trying to do this with resize2fs, but if I use the values in

cat /proc/partitions
major minor  #blocks  name

 202        0  178257920 xvda
 202        1  178249871 xvda1
 202       32   47185920 xvdc
 202       33   47184896 xvdc1

like this

ubuntu@asdf:~$ sudo resize2fs /dev/xvda1 47184896

I get

resize2fs 1.42.13 (17-May-2015)
The containing partition (or device) is only 44562467 (4k) blocks.
You requested a new size of 47184896 blocks.

I have a simliar problem when using parted.

$ sudo parted /dev/xvda
GNU Parted 3.2
Using /dev/xvda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) resizepart 1 94371839
Error: The location 94371839 is outside of the device /dev/xvda.

If I try to do resizepart 1 94371839 for '/dev/xvda1' in parted I get Error: The location 94371839 is outside of the device /dev/xvda1. when it's clearly within the block range of the device as shown with

sudo fdisk -l

Disk /dev/xvda: 170 GiB, 182536110080 bytes, 356515840 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot Start       End   Sectors  Size Id Type
/dev/xvda1 *    16065 356515806 356499742  170G 83 Linux

This is driving me nuts. How do I get the proper values for the filesystem size and partition size to use with resize2fs and parted?

resize2fs doesn't misread the number of blocks. It is just using 4k blocks while /proc/partitions is reporting 1k blocks.

356499742 x 512B sectors = 178249871 x 1K blocks = 44562467 x 4K blocks

With parted, you can to configure the unit you want to use. It seems parted uses MB by default, so you are asking to resize a 170GB partition to 94TB, which it rightly refuses.

Here is one way to do it correctly:

parted /dev/sdb
GNU Parted 3.2
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) help unit                                                        
  unit UNIT                                set the default unit to UNIT

    UNIT is one of: s, B, kB, MB, GB, TB, compact, cyl, chs, %, kiB, MiB,
        GiB, TiB
(parted) unit kiB                                                         
(parted) print                                                            
Model: ATA VBOX HARDDISK (scsi)
Disk /dev/sdb: 524288kiB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start      End        Size       Type     File system  Flags
 1      1024kiB    205824kiB  204800kiB  primary  ext3
 2      205824kiB  410624kiB  204800kiB  primary  ext3
(parted) resizepart 1 200000                                              
Warning: Shrinking a partition can cause data loss, are you sure you want to
continue?
Yes/No? Yes                                                               
(parted) print                                                            
Model: ATA VBOX HARDDISK (scsi)
Disk /dev/sdb: 524288kiB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start      End        Size       Type     File system  Flags
 1      1024kiB    200000kiB  198977kiB  primary  ext3
 2      205824kiB  410624kiB  204800kiB  primary  ext3