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Finding the Fourth Proportional to 462.18, 693.39 and 137.55

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Solution

The fourth proportional to 462.18, 693.39 and 137.55 is: 206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.18 : 693.39 = 137.55 : x
  2. Step 2: Convert to fraction form
    462.18/693.39 = 137.55/x
  3. Step 3: Cross multiply
    462.18x = 693.39 × 137.55
  4. Step 4: Simplify right side
    462.18x = 95,375.79
  5. Step 5: Solve for x
    x = 95,375.79/462.18
  6. Step 6: Final answer
    x = 206.36

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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.