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Finding the Fourth Proportional to 426,366.92, 639,499.44 and 331,691.60

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Solution

The fourth proportional to 426,366.92, 639,499.44 and 331,691.60 is: 497,497.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,366.92 : 639,499.44 = 331,691.60 : x
  2. Step 2: Convert to fraction form
    426,366.92/639,499.44 = 331,691.60/x
  3. Step 3: Cross multiply
    426,366.92x = 639,499.44 × 331,691.60
  4. Step 4: Simplify right side
    426,366.92x = 212,116,592,452.70
  5. Step 5: Solve for x
    x = 212,116,592,452.70/426,366.92
  6. Step 6: Final answer
    x = 497,497.77

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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.