A. Introduction

Let’s find out what you already know about proportion.

Answer the following.

a. Which of the following pair of pictures is an example of proportion?

b. There are different sets of ingredients in preparing buko pie. Given below are the ingredients for pie filling which is good for eight persons.

If you are asked to prepare for 24 persons, how much coconut water is needed in preparing the filling?

c. Is there a possible way to find the height of the flag of the Philippines raised at San Pablo City Plaza without directly measuring it?

B. Development

PROPORTION

When we recall the definition of ratio of two numbers, it is the comparison of two quantities. For any two numbers, x and y, y ≠ 0 the ratio is the quotient obtained by dividing x and y. The two numbers are called the terms. The ratio can be written in the following form: 𝑥/𝑦(fraction form), x:y(read as “x is to y”),x to y.

Directions: Answer the following accordingly.

1. How would you describe proportion?

2. Cite an example where you can apply proportion in your everyday life. Describe how you can you apply the proportion in that situation.

3. If a : b : c = 5 : 3 : 2 where a, b and c > 0, find the values of a, b and c when a² – b² -c² = 108.

I understand that ___________________.

I realize that ________________________.

I need to learn more about __________.

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