I am looking to take a 3D model from the warehouse and scale it from full size to a scale, i.e. 1’=1/4" or 1:48. I have been successful so far in using the tape measure tool with models I have drafted myself (reference line at 1’, re-size model so 1’=1/4") but this does not work with imported images. I have figured out the scale tool as so far as typing .5 while scaling will scale the model to half it’s size, and so on. However, I cannot wrap my head around the number to type in to get the desired ratio scale. Because it’s not the percentage of 1’, it’s of the entire model.

Please help.