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Finding the Fourth Proportional to 639,592.72, 959,375.78 and 213,159.44

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Solution

The fourth proportional to 639,592.72, 959,375.78 and 213,159.44 is: 319,734.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,592.72 : 959,375.78 = 213,159.44 : x
  2. Step 2: Convert to fraction form
    639,592.72/959,375.78 = 213,159.44/x
  3. Step 3: Cross multiply
    639,592.72x = 959,375.78 × 213,159.44
  4. Step 4: Simplify right side
    639,592.72x = 204,500,002,948.57
  5. Step 5: Solve for x
    x = 204,500,002,948.57/639,592.72
  6. Step 6: Final answer
    x = 319,734.73

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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.