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Finding the Fourth Proportional to 457.29, 686.15 and 240.83

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Solution

The fourth proportional to 457.29, 686.15 and 240.83 is: 361.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.29 : 686.15 = 240.83 : x
  2. Step 2: Convert to fraction form
    457.29/686.15 = 240.83/x
  3. Step 3: Cross multiply
    457.29x = 686.15 × 240.83
  4. Step 4: Simplify right side
    457.29x = 165,240.87
  5. Step 5: Solve for x
    x = 165,240.87/457.29
  6. Step 6: Final answer
    x = 361.35

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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.