Check sibling questions

If two ratios are equal, we say they are in proportion

Example:

    1/2 & 3/6

10.jpg

 

∴ 1/2 = 3/6

i.e.

  1 : 2 = 3 : 6

 

We also write it as

Proportion - Part 2

 

And we say that,

  1, 2, 3, 6 are in proportion

 

Note:

When we write 4 numbers in proportion

1 , 2, 3, 6

1 , 6 are called extreme terms

2 , 3 are called middle terms

 

Are 10, 20, 40, 80 in proportion?

   

Ratio of 10 & 20 = 10/20

= 1/2

 

= 1 : 2

Ratio of 40 & 80 = 40/80

= 4/8

= 1/2

= 1 : 2

∴ 10 : 20 = 40 : 80

So, 10, 20, 40, 80 are in proportion

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Transcript

1 : 2 ∷ 3 : 6 Ratio Proportion

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.