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Finding the Fourth Proportional to 231, 318.76 and 132.76

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Solution

The fourth proportional to 231, 318.76 and 132.76 is: 183.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    231 : 318.76 = 132.76 : x
  2. Step 2: Convert to fraction form
    231/318.76 = 132.76/x
  3. Step 3: Cross multiply
    231x = 318.76 × 132.76
  4. Step 4: Simplify right side
    231x = 42,318.58
  5. Step 5: Solve for x
    x = 42,318.58/231
  6. Step 6: Final answer
    x = 183.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.