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Finding the Fourth Proportional to 678,749.90, 936,691.02 and 372,832.68

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Solution

The fourth proportional to 678,749.90, 936,691.02 and 372,832.68 is: 514,517.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,749.90 : 936,691.02 = 372,832.68 : x
  2. Step 2: Convert to fraction form
    678,749.90/936,691.02 = 372,832.68/x
  3. Step 3: Cross multiply
    678,749.90x = 936,691.02 × 372,832.68
  4. Step 4: Simplify right side
    678,749.90x = 349,229,023,318.53
  5. Step 5: Solve for x
    x = 349,229,023,318.53/678,749.90
  6. Step 6: Final answer
    x = 514,517.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.