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❶Proportion refers to the equality of two ratios. Anyone can earn credit-by-exam regardless of age or education level.

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If you are a student of the middle school, you will definitely have a math project. If we are told that the ratio of wheels to cars is 4: A simple proportion will do perfectly. We know that 4: We can setup the problem like this, where x is our missing number of cars:. To solve a proportion like this, we will use a procedure called cross-multiplication. This process involves multiplying the two extremes and then comparing that product with the product of the means.

An extreme is the first number 4 , and the last number x , and a mean is the 1 or the The process is very simple if you remember it as cross-multiplying, because you multiply diagonally across the equal sign. You should then take the two products, 12 and 4x, and put them on opposite sides of an equation like this: Reading back over the problem we remember that x stood for the number of cars possible with 12 tires, and that is our answer.

It is possible to have many variations of proportions, and one you might see is a double-variable proportion. It looks something like this, but it easy to solve.

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Help with Proportions. A proportion occurs when two ratios are forced to be equal to each other. This selection will allow you to find a second ratio that is in the same proportion as the first. Since a ratio is made up of two numbers, Website Map | Math Homework Help.

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Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions.

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Number statements that contain proportions are statements of equivalent fractions. If the proportions contain variables, they can be solved with many methods. Math lesson on proportions and ratios, with definitions and various examples to review the key topics with ratios and proportions.

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A ratio compares quantities as fractions. A proportion states 2 ratios are equal. About Us Careers Blog Contact Us. Sign-In. Homework Help; Specialized Programs. ADD/ADHD Tutoring Programs; Math Review of Rates, Ratios, and Proportions. Homework resources in Proportions - Algebra - Math. Military Families. The official provider of online tutoring and homework help to the Department of Defense. Check Eligibility. Higher Education. Improve persistence and course completion with 24/7 student support online. How it Works.