If by "similar" you mean that they should be in the same subnet, then yes, they should. If you aren't using subnet masks, any IP in the range 192.168.4.XXX up to 254 that isn't already taken should work.
If by "similar" you mean that they should be in the same subnet, then yes, they should. If you aren't using subnet masks, any IP in the range 192.168.4.XXX up to 254 that isn't already taken should work.