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Finding the Fourth Proportional to 231.18, 318.98 and 132.90

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Solution

The fourth proportional to 231.18, 318.98 and 132.90 is: 183.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.18 : 318.98 = 132.90 : x
  2. Step 2: Convert to fraction form
    231.18/318.98 = 132.90/x
  3. Step 3: Cross multiply
    231.18x = 318.98 × 132.90
  4. Step 4: Simplify right side
    231.18x = 42,392.44
  5. Step 5: Solve for x
    x = 42,392.44/231.18
  6. Step 6: Final answer
    x = 183.37

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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.