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Finding the Fourth Proportional to 521,419.34, 781,818.39 and 161,483.56

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Solution

The fourth proportional to 521,419.34, 781,818.39 and 161,483.56 is: 242,129.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,419.34 : 781,818.39 = 161,483.56 : x
  2. Step 2: Convert to fraction form
    521,419.34/781,818.39 = 161,483.56/x
  3. Step 3: Cross multiply
    521,419.34x = 781,818.39 × 161,483.56
  4. Step 4: Simplify right side
    521,419.34x = 126,250,817,439.61
  5. Step 5: Solve for x
    x = 126,250,817,439.61/521,419.34
  6. Step 6: Final answer
    x = 242,129.14

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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.