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Finding the Fourth Proportional to 638,700.20, 958,680.62 and 339,179.92

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Solution

The fourth proportional to 638,700.20, 958,680.62 and 339,179.92 is: 509,104.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,700.20 : 958,680.62 = 339,179.92 : x
  2. Step 2: Convert to fraction form
    638,700.20/958,680.62 = 339,179.92/x
  3. Step 3: Cross multiply
    638,700.20x = 958,680.62 × 339,179.92
  4. Step 4: Simplify right side
    638,700.20x = 325,165,215,997.15
  5. Step 5: Solve for x
    x = 325,165,215,997.15/638,700.20
  6. Step 6: Final answer
    x = 509,104.61

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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.