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Finding the Fourth Proportional to 461.18, 691.79 and 136.55

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Solution

The fourth proportional to 461.18, 691.79 and 136.55 is: 204.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.18 : 691.79 = 136.55 : x
  2. Step 2: Convert to fraction form
    461.18/691.79 = 136.55/x
  3. Step 3: Cross multiply
    461.18x = 691.79 × 136.55
  4. Step 4: Simplify right side
    461.18x = 94,464.97
  5. Step 5: Solve for x
    x = 94,464.97/461.18
  6. Step 6: Final answer
    x = 204.83

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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.