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Finding the Fourth Proportional to 681,359.52, 940,268.52 and 387,007.12

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Solution

The fourth proportional to 681,359.52, 940,268.52 and 387,007.12 is: 534,065.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,359.52 : 940,268.52 = 387,007.12 : x
  2. Step 2: Convert to fraction form
    681,359.52/940,268.52 = 387,007.12/x
  3. Step 3: Cross multiply
    681,359.52x = 940,268.52 × 387,007.12
  4. Step 4: Simplify right side
    681,359.52x = 363,890,611,951.86
  5. Step 5: Solve for x
    x = 363,890,611,951.86/681,359.52
  6. Step 6: Final answer
    x = 534,065.50

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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.