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Finding the Fourth Proportional to 639,387.72, 959,234.85 and 212,927.24

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Solution

The fourth proportional to 639,387.72, 959,234.85 and 212,927.24 is: 319,441.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,387.72 : 959,234.85 = 212,927.24 : x
  2. Step 2: Convert to fraction form
    639,387.72/959,234.85 = 212,927.24/x
  3. Step 3: Cross multiply
    639,387.72x = 959,234.85 × 212,927.24
  4. Step 4: Simplify right side
    639,387.72x = 204,247,226,200.31
  5. Step 5: Solve for x
    x = 204,247,226,200.31/639,387.72
  6. Step 6: Final answer
    x = 319,441.90

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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.