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Ratio and Proportion - Lesson 6
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Arka Roy
“Star Educator” in UNACADEMY || Plus Educator || Subscribe on Unacademy Plus by using referral code "royarka1990-4337"

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Unacademy user
This lecture is really helpful for me sir...good work...waiting for next lecture....
thank you
  1. Ratio and Proportion made easy Lesson 6


  2. Properties of proportion If 4 quantities are in proportion then many other proportions may be deduced using the properties of fraction.


  3. Properties of proportion Property 1:Invertendo b d if a = c then-=- Example: 2-hence 5 = 4


  4. Properties of proportion Property 2: Alternando if a = then a = b Example: hence = 6


  5. Properties of proportion Property 3: Componendo If a = c then a+b- c+d b d Example 2+3 4+6 hence 3 6


  6. Properties of proportion Property 4 Dividendo if a = then abb =- Example: hence 3 4-6 3 6


  7. Properties of proportion Property 5: Componendo and Dividendo a If C a -b c-d Example: 2+3 4+6 hence, 2-3 4-6


  8. Thank You Arka Roy