SaiBook.us Math

Home Course Section Lesson

Lesson Topics Discussion Quiz: Class Homework

Example1

Title: Measurement

Grade Lesson s3-p2

Explanation: The best way to understand PSAT-4 is by looking at some examples. Take turns and read each example for easy understanding.

Examples

Topics → Definition Example1 Example2

Find the third proportion to 6 , 8 and 10.

Step: 1

Here a = 6, b = 8, c = x and d = 10.
First, write in proportion form \$a/b :: c/d\$
i.e., \$6/8 :: x/10\$.

Explanation:

Given proportion a = 6, b = 8 ,c = x and d = 10.
Let’s get started! Just write the proportion like this: \$a/b :: c/d\$.
For instance, you can use \$6/8 :: x/10\$.

Step: 2

Now, to find the fourth proportion, solve for \$x = (10 × 8)/6\$ = 13.33.
So, the fourth ratio is 13.33.

Explanation:

In this step, we find the fourth proportion using \$x = (10 × 8)/6\$ and get 13.33 as the answer.
The fourth ratio equals 13.33.