Question

most conventional tv screens have a width : height ratio of 4:3. if a screen has a width of 42 inches what is its height?

Answer 1

Answer: 31.5 inches

Here's one approach how to get that answer

width/height = 4/3

42/h = 4/3

42*3 = 4h

126 = 4h

4h = 126

h = 126/4

h = 31.5 inches