# What’s the Error? A student said that the ratios 3/4 and 9/16 were proportional. What error did the student make

**Solution:**

A student said that the ratios 3/4 and 9/16 were proportional.

We have to find the error made by the student

We know that the two ratios a:b and c:d are said to be proportional if a/b = c/d or ad = bc

Given, a : b = 3 : 3

c : d = 9 : 16

ad = 3(16) = 48

bc = 3(9) = 27

ad ≠ bc

The given ratios do not satisfy the conditions to be proportional.

Therefore, the given ratios are not proportional.

**✦ Try This: **What’s the Error? A student said that the ratios 2/5 and 10/17 were proportional. What error did the student make?

**☛ Also Check: **NCERT Solutions for Class 7 Maths Chapter 8

**NCERT Exemplar Class 7 Maths Chapter 7 Problem 120**

## What’s the Error? A student said that the ratios 3/4 and 9/16 were proportional. What error did the student make

**Summary:**

A student said that the ratios 3/4 and 9/16 were proportional. The error made by the student is that he had multiplied the numerator by 3 and denominator by 4.

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