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Finding the Fourth Proportional to 392.60, 588.90 and 132.64

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Solution

The fourth proportional to 392.60, 588.90 and 132.64 is: 198.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.60 : 588.90 = 132.64 : x
  2. Step 2: Convert to fraction form
    392.60/588.90 = 132.64/x
  3. Step 3: Cross multiply
    392.60x = 588.90 × 132.64
  4. Step 4: Simplify right side
    392.60x = 78,111.70
  5. Step 5: Solve for x
    x = 78,111.70/392.60
  6. Step 6: Final answer
    x = 198.96

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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.