Home / 766,609.38-1,057,342.41-721,404.90

Finding the Fourth Proportional to 766,609.38, 1,057,342.41 and 721,404.90

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Solution

The fourth proportional to 766,609.38, 1,057,342.41 and 721,404.90 is: 994,994.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,609.38 : 1,057,342.41 = 721,404.90 : x
  2. Step 2: Convert to fraction form
    766,609.38/1,057,342.41 = 721,404.90/x
  3. Step 3: Cross multiply
    766,609.38x = 1,057,342.41 × 721,404.90
  4. Step 4: Simplify right side
    766,609.38x = 762,771,995,551.81
  5. Step 5: Solve for x
    x = 762,771,995,551.81/766,609.38
  6. Step 6: Final answer
    x = 994,994.34

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.