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Finding the Fourth Proportional to 442,139.40, 663,257.70 and 161,717.40

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Solution

The fourth proportional to 442,139.40, 663,257.70 and 161,717.40 is: 242,593.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,139.40 : 663,257.70 = 161,717.40 : x
  2. Step 2: Convert to fraction form
    442,139.40/663,257.70 = 161,717.40/x
  3. Step 3: Cross multiply
    442,139.40x = 663,257.70 × 161,717.40
  4. Step 4: Simplify right side
    442,139.40x = 107,260,310,773.98
  5. Step 5: Solve for x
    x = 107,260,310,773.98/442,139.40
  6. Step 6: Final answer
    x = 242,593.88

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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.