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Home > Algebra > Ratio and Proportion > Rule of Three calculator
Method and examples
Rule of Three calculator
Direct Rule of Three a/b=c/x, Inverse Rule of Three a*b=c*x
 
7. Rule of Three
Direct Rule / Inverse Rule Method :
/ = /
  1. Direct Rule of Three, `3 / 5 = 6 / x`
  2. Direct Rule of Three, `2 / 5 = 6 / x`
  3. Inverse Rule of Three, `4 xx 9 = 6 xx x`
  4. Inverse Rule of Three, `3 xx 12 = 4 xx x`
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