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Finding the Fourth Proportional to 521,105.10, 781,657.65 and 307,653.90

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Solution

The fourth proportional to 521,105.10, 781,657.65 and 307,653.90 is: 461,480.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,105.10 : 781,657.65 = 307,653.90 : x
  2. Step 2: Convert to fraction form
    521,105.10/781,657.65 = 307,653.90/x
  3. Step 3: Cross multiply
    521,105.10x = 781,657.65 × 307,653.90
  4. Step 4: Simplify right side
    521,105.10x = 240,480,024,487.34
  5. Step 5: Solve for x
    x = 240,480,024,487.34/521,105.10
  6. Step 6: Final answer
    x = 461,480.85

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Similar ratio
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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.