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Finding the Fourth Proportional to 311.24, 466.96 and 137.88

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Solution

The fourth proportional to 311.24, 466.96 and 137.88 is: 206.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.24 : 466.96 = 137.88 : x
  2. Step 2: Convert to fraction form
    311.24/466.96 = 137.88/x
  3. Step 3: Cross multiply
    311.24x = 466.96 × 137.88
  4. Step 4: Simplify right side
    311.24x = 64,382.93
  5. Step 5: Solve for x
    x = 64,382.93/311.24
  6. Step 6: Final answer
    x = 206.86

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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.