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Finding the Fourth Proportional to 311.57, 467.48 and 95.15

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Solution

The fourth proportional to 311.57, 467.48 and 95.15 is: 142.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.57 : 467.48 = 95.15 : x
  2. Step 2: Convert to fraction form
    311.57/467.48 = 95.15/x
  3. Step 3: Cross multiply
    311.57x = 467.48 × 95.15
  4. Step 4: Simplify right side
    311.57x = 44,480.72
  5. Step 5: Solve for x
    x = 44,480.72/311.57
  6. Step 6: Final answer
    x = 142.76

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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.