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Finding the Fourth Proportional to 720,785.52, 994,687.92 and 394,099.56

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Solution

The fourth proportional to 720,785.52, 994,687.92 and 394,099.56 is: 543,859.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,785.52 : 994,687.92 = 394,099.56 : x
  2. Step 2: Convert to fraction form
    720,785.52/994,687.92 = 394,099.56/x
  3. Step 3: Cross multiply
    720,785.52x = 994,687.92 × 394,099.56
  4. Step 4: Simplify right side
    720,785.52x = 392,006,071,609.32
  5. Step 5: Solve for x
    x = 392,006,071,609.32/720,785.52
  6. Step 6: Final answer
    x = 543,859.53

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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.