A photo that is 5 inches by 7 inches is being enlarged on a canvas .If the canvas is 30 inches wide what is the height?
Assuming you want to enlarge the photo, (keep the same ratio of height to width), and assuming that your photo is in portrait form, ....
7/5 = x/30
5x = 210
x = 42
check: 30 : 42 = 5 : 7, I kept my ratio