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Finding the Fourth Proportional to 457,791.20, 686,686.80 and 424,613.60

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Solution

The fourth proportional to 457,791.20, 686,686.80 and 424,613.60 is: 636,920.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,791.20 : 686,686.80 = 424,613.60 : x
  2. Step 2: Convert to fraction form
    457,791.20/686,686.80 = 424,613.60/x
  3. Step 3: Cross multiply
    457,791.20x = 686,686.80 × 424,613.60
  4. Step 4: Simplify right side
    457,791.20x = 291,576,554,220.48
  5. Step 5: Solve for x
    x = 291,576,554,220.48/457,791.20
  6. Step 6: Final answer
    x = 636,920.40

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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.