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Finding the Fourth Proportional to 521,572.80, 782,359.20 and 370,997.85

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Solution

The fourth proportional to 521,572.80, 782,359.20 and 370,997.85 is: 556,496.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,572.80 : 782,359.20 = 370,997.85 : x
  2. Step 2: Convert to fraction form
    521,572.80/782,359.20 = 370,997.85/x
  3. Step 3: Cross multiply
    521,572.80x = 782,359.20 × 370,997.85
  4. Step 4: Simplify right side
    521,572.80x = 290,253,581,127.72
  5. Step 5: Solve for x
    x = 290,253,581,127.72/521,572.80
  6. Step 6: Final answer
    x = 556,496.78

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.