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Finding the Fourth Proportional to 424,186.28, 636,380.76 and 124,660.28

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Solution

The fourth proportional to 424,186.28, 636,380.76 and 124,660.28 is: 187,020.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,186.28 : 636,380.76 = 124,660.28 : x
  2. Step 2: Convert to fraction form
    424,186.28/636,380.76 = 124,660.28/x
  3. Step 3: Cross multiply
    424,186.28x = 636,380.76 × 124,660.28
  4. Step 4: Simplify right side
    424,186.28x = 79,331,403,728.21
  5. Step 5: Solve for x
    x = 79,331,403,728.21/424,186.28
  6. Step 6: Final answer
    x = 187,020.20

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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.