Question

Jada made a model of the Space Needle in Seattle for a science project. She used a scale of 2 inches = 55 feet. If her project is 22 inches tall, find the actual height of the Space Needle. *

Answer 1

You can set up a proportion like

"scale for inches" : "scale for feet" = "actual inches" : "actual feet"

Plugging the numbers, you have

$2\div 55 = 22\div x$

Now, you can either solve this proportion by x, or simply realize that you can start from the "2 inches = 55 feet" scale, and multiply both sides by 11 to get that 22 inches are

$55\cdot 11 = 605$ feet.