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Home > CCG > Chapter 5 > Lesson 5.2.2 > Problem 5-67


Hadrosaurs, a family of duck-billed, plant-eating dinosaurs, were large creatures with thick, strong tails. It has recently been determined that hadrosaurs probably originated in North America.  

Scientists in Alaska recently found a hadrosaur footprint like the one at right that measured inches across. It is believed that the footprint was created by a young dinosaur that was approximately feet long. Adult hadrosaurs have been known to be feet long. How wide would you expect a footprint of an adult hadrosaur to be? Show your reasoning.

A footprint  where there are 3 toes and a heal. It measured 14 inches across.

Set up a proportional equation comparing foot size and length in adult and juvenile hadrosaurs.

See the example below, one of several possibilities.

Around inches