a pixel, is a pixel, is a pixel. If you render an image at 3200x4000 pixels it DOES NOT MATTER WHAT THE SCALING IS. You will still have an image that is 3200x4000 weather it's "called" 72dpi or 400dpi. When you print either your software will scale it down to fit your paper medium, or give you a warning that the image wont fit with the scaling that it is set to. It won't lower the resolution of your image to fit the sheet of paper it just changes the scaling. Ignore the scaling in Poser. If you render 3200x4000 THAT IS WHAT YOU GET.

W10, Ryzen 5 1600x, 16Gb,RTX2060Super+GTX980, PP11, 11.3.740