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Step-3

Title: Ratio & Proportion

Grade: 8-a Lesson: S4-L8

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Find the fourth proportion to 4 , 6 and 8.
2	Step	Let us take the third proportion is	\$x\$
3	Step	We can write the above numbers in the proportional form (a : b :: c : d)	\$4 : 6::8 : x \$
4	Hint	\$a/b::c/d\$
5	Step	Here a = 4 , b = 6 , c = 8 & d = x
6	Step	Let us find the x value	x = \$ (6 \times 8)/4\$ x = \$12\$
7	SumUp	Can you summarize what you’ve understood in the above steps?
8	Choice.A	21 is wrong; it doesn’t follow the proportional relationship between the terms	21
9	Choice.B	The proportional relationship between the terms shows that 22 is incorrect	22
10	Choice.C	23 is incorrect because it does not match the correct calculation of the fourth proportion	23
11	Choice.D	Correct fourth proportion calculation result	12
12	Answer	Option	D
13	SumUp	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Find the fourth proportion to 4 , 6 and 8.

Step

Let us take the third proportion is

\$x\$

Step

We can write the above numbers in the proportional form
(a : b :: c : d)

\$4 : 6::8 : x \$

Hint

\$a/b::c/d\$

Step

Here a = 4 , b = 6 , c = 8 & d = x

Step

Let us find the x value

x = \$ (6 \times 8)/4\$

x = \$12\$

SumUp

Can you summarize what you’ve understood in the above steps?

Choice.A

21 is wrong; it doesn’t follow the proportional relationship between the terms

Choice.B

The proportional relationship between the terms shows that 22 is incorrect

Choice.C

23 is incorrect because it does not match the correct calculation of the fourth proportion

Choice.D

Correct fourth proportion calculation result

Answer

Option

SumUp

Can you summarize what you’ve understood in the above steps?