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Finding the Fourth Proportional to 521,109.10, 781,663.65 and 307,657.90

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Solution

The fourth proportional to 521,109.10, 781,663.65 and 307,657.90 is: 461,486.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,109.10 : 781,663.65 = 307,657.90 : x
  2. Step 2: Convert to fraction form
    521,109.10/781,663.65 = 307,657.90/x
  3. Step 3: Cross multiply
    521,109.10x = 781,663.65 × 307,657.90
  4. Step 4: Simplify right side
    521,109.10x = 240,484,997,065.34
  5. Step 5: Solve for x
    x = 240,484,997,065.34/521,109.10
  6. Step 6: Final answer
    x = 461,486.85

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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.