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Finding the Fourth Proportional to 502,644.98, 753,966.99 and 128,667.38

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Solution

The fourth proportional to 502,644.98, 753,966.99 and 128,667.38 is: 193,000.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,644.98 : 753,966.99 = 128,667.38 : x
  2. Step 2: Convert to fraction form
    502,644.98/753,966.99 = 128,667.38/x
  3. Step 3: Cross multiply
    502,644.98x = 753,966.99 × 128,667.38
  4. Step 4: Simplify right side
    502,644.98x = 97,010,957,209.79
  5. Step 5: Solve for x
    x = 97,010,957,209.79/502,644.98
  6. Step 6: Final answer
    x = 193,000.95

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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.