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Finding the Fourth Proportional to 351,663.52, 527,487.84 and 85,425.28

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Solution

The fourth proportional to 351,663.52, 527,487.84 and 85,425.28 is: 128,136.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,663.52 : 527,487.84 = 85,425.28 : x
  2. Step 2: Convert to fraction form
    351,663.52/527,487.84 = 85,425.28/x
  3. Step 3: Cross multiply
    351,663.52x = 527,487.84 × 85,425.28
  4. Step 4: Simplify right side
    351,663.52x = 45,060,796,428.60
  5. Step 5: Solve for x
    x = 45,060,796,428.60/351,663.52
  6. Step 6: Final answer
    x = 128,136.11

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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.