Home / 747,712.70-1,121,569.05-431,800.55

Finding the Fourth Proportional to 747,712.70, 1,121,569.05 and 431,800.55

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Solution

The fourth proportional to 747,712.70, 1,121,569.05 and 431,800.55 is: 647,700.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,712.70 : 1,121,569.05 = 431,800.55 : x
  2. Step 2: Convert to fraction form
    747,712.70/1,121,569.05 = 431,800.55/x
  3. Step 3: Cross multiply
    747,712.70x = 1,121,569.05 × 431,800.55
  4. Step 4: Simplify right side
    747,712.70x = 484,294,132,652.98
  5. Step 5: Solve for x
    x = 484,294,132,652.98/747,712.70
  6. Step 6: Final answer
    x = 647,700.83

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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.