Lesson Example Discussion Quiz: Class Homework |
Lesson |
Title: Ratio & Proportion |
Grade: 1300-a Lesson: S4-L8 |
Explanation: Hello Students, time to learn definitions. Let us take turns and read definitions and explain the pictures. Try to remember or memorize the definitions. Pay special attention to the pictures and communicate in your own words. |
Lesson:
Definition: Ratio & Proportion |
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The ratio is defined as the comparison of two quantities of the same units. According to proportion, if two sets of given numbers are increasing or decreasing in the same ratio, then the ratios are said to be directly proportional to each other. Proportions are denoted using the symbol :: or =. |
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Explanation: To find the third proportional number to 9 and 12, assign it the variable x. Use the proportion 9 : 12::12 : x. Cross-multiply to get x = 16. Therefore, the third proportional number is 16. |
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