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Finding the Fourth Proportional to 861,503.28, 1,188,874.56 and 479,521.88

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Solution

The fourth proportional to 861,503.28, 1,188,874.56 and 479,521.88 is: 661,740.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,503.28 : 1,188,874.56 = 479,521.88 : x
  2. Step 2: Convert to fraction form
    861,503.28/1,188,874.56 = 479,521.88/x
  3. Step 3: Cross multiply
    861,503.28x = 1,188,874.56 × 479,521.88
  4. Step 4: Simplify right side
    861,503.28x = 570,091,364,095.37
  5. Step 5: Solve for x
    x = 570,091,364,095.37/861,503.28
  6. Step 6: Final answer
    x = 661,740.21

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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.