Iam not good at math, from  what I know, 3dsmax is not a precision modeling program  so you will never get  a perfect number match, also if you are modeling something for poser let us use a door for example, you import v3 at 1000 for ref. make your door if you export the door at .001 and import to poser you wont see it unless you check in poser ,centre object and place in foor, if you want it to be in the same spot you modeled it in max lets say behind v3, this is what you have to do

1 center the gizmo at xyz "0" not the door
2 scale the door to 0.1
3 export the door at 1.0
in this way you can model things like tables chairs, an earing  ect. and the will line up in poser the
way they did in max
does this make sense ?