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Finding the Fourth Proportional to 681,897.76, 940,673.04 and 520,472.56

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Solution

The fourth proportional to 681,897.76, 940,673.04 and 520,472.56 is: 717,988.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,897.76 : 940,673.04 = 520,472.56 : x
  2. Step 2: Convert to fraction form
    681,897.76/940,673.04 = 520,472.56/x
  3. Step 3: Cross multiply
    681,897.76x = 940,673.04 × 520,472.56
  4. Step 4: Simplify right side
    681,897.76x = 489,594,505,251.78
  5. Step 5: Solve for x
    x = 489,594,505,251.78/681,897.76
  6. Step 6: Final answer
    x = 717,988.14

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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.