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Finding the Fourth Proportional to 866,877.11, 1,300,324.56 and 387,129.32

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Solution

The fourth proportional to 866,877.11, 1,300,324.56 and 387,129.32 is: 580,697.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,877.11 : 1,300,324.56 = 387,129.32 : x
  2. Step 2: Convert to fraction form
    866,877.11/1,300,324.56 = 387,129.32/x
  3. Step 3: Cross multiply
    866,877.11x = 1,300,324.56 × 387,129.32
  4. Step 4: Simplify right side
    866,877.11x = 503,393,756,190.48
  5. Step 5: Solve for x
    x = 503,393,756,190.48/866,877.11
  6. Step 6: Final answer
    x = 580,697.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.