Applications of Proportions

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Taught by muchomath
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Lesson Summary:

In this lesson on Applications of Proportions, the professor teaches how to set up and use proportions to solve real-world problems. Examples include calculating how far a car travels in a given time at a certain speed, finding out the distance between two cities on a map using a scale, and calculating how much a salesman will be paid for the number of miles traveled. By the end of the lesson, students will be able to apply proportions to solve similar problems.

Lesson Description:

Learn how to set up and use proportions in some real-world application problems.

Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.

Questions answered by this video:
  • What are some real-life applications of proportions?
  • If a car travels 65 miles per hour, how many miles will the car travel in 7 hours?
  • How do you set up and solve a proportion from a real-life application word problem?
  • How do you solve 65/1 = x/7?
  • If on a road map, the scale indicates that 1 inch represents 70 miles, and the measured distance between two cities on the map is 8 3/4 inches, how many miles apart are they?
  • How do you solve 1/70 = 8.75/x?
  • If a traveling salesman is paid $0.22 for every mile he travels using his personal vehicle, and the salesman traveled 473 miles last month, how much money does he receive for his travel?
  • How do you solve 0.22/1 = x/473?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson shows some reasons that you need to know how to set up and solve proportions. These are problems that come up in real life that you may need to solve using a proportion. This is a great tutorial on using proportions.