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Finding the Fourth Proportional to 437,868.56, 656,891.80 and 138,395.92

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Solution

The fourth proportional to 437,868.56, 656,891.80 and 138,395.92 is: 207,622.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,868.56 : 656,891.80 = 138,395.92 : x
  2. Step 2: Convert to fraction form
    437,868.56/656,891.80 = 138,395.92/x
  3. Step 3: Cross multiply
    437,868.56x = 656,891.80 × 138,395.92
  4. Step 4: Simplify right side
    437,868.56x = 90,911,145,001.46
  5. Step 5: Solve for x
    x = 90,911,145,001.46/437,868.56
  6. Step 6: Final answer
    x = 207,622.00

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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.