@ChromeStar: I'm with you generally. But I have a bit problem like you use the word "resolution" (may be it's a german-english problem of me). With a look to the Photoshop example in the post above yours it's like I understand.

On one hand there is the PIXEL DIMENSIONS in height-pixel and width-pixel giving the resulting file size of the image in megabyte, kilobyte or such. And on the other hand there is the DOCUMENT SIZE given in height-inches and width-inches (or if choosen cm or such) AND the resolution what is the DPI. And DPI is the bridge between both blocks e.g. changing that DPI while pixel dimensions keeps the same will change the document size in inches.

And @igohigh that Photoshop example is from your starting post and if you change the DPI to 300 you should get 11 and 8.5 inches without resampling instead of those 45 and 35. So Poser and Photoshop are on the same road although one is driving on right side and the other left side. So that should be ok. And is not the same problem what Rhia474 is reporting although I'm not sure cause I know only pixel dimensions and DPI from her post and not the document size in inches what MS is not reporting in it's dialogs. What I really don't understand is your PaintShopPro example. There is a DPI of 28 with paper size 4535 and coming to 72 with 11185 inches paper size. Strange .... could it be that you have given the decimal point one position to far and how does it come to the 28.350 DPI in original ?

@Rhia474: Could it be that this depth of field like ChromeStar is guessing could be the point. Don't know if you are having Photoshop but most other 2d-programs should do also. Tried you to put both images into Photoshop and had a look to the document (paper) size in relation to DPI ? Btw. John Csaki answers are often a bit like the famous "soon" from DAZ support. February this year is not so bad cause I got such answers years ago in SmithMicro times on problems I reported and waiting up to now for corrections ... :-O