Question 123278
If 1 inch in the model equals 1.5 feet in real life, then 1 inch in the model equals 18 inches in real life {{{1.5 * 12 = 18}}}.  That means the scale is 1:18.


There are 5280 feet in 1 mile, so 3/4 of a mile is {{{5280*3/4=3960}}} feet.


Now, since the scale is 1:18, every 18 feet in real life is represented by 1 foot in the model.  So the question becomes how many 18s are in 3960?


{{{3960/18=220}}} feet.


So 3/4 mile would be represented by 220 feet in the diorama model.


Now you really have a problem!  Since the Washington is in the middle of the National Mall, that 220 feet is only 1/2 of the length of your entire diorama.  The whole thing would have to be 440 feet long or just under 150 yards.  You need a one and a half football fields to build this thing at this scale.  You would do better to have a scale of 1 inch = 150 feet.  That gets your model down to a much more manageable 4.4 feet long.