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Finding the Fourth Proportional to 311.88, 467.76 and 167.64

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Solution

The fourth proportional to 311.88, 467.76 and 167.64 is: 251.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.88 : 467.76 = 167.64 : x
  2. Step 2: Convert to fraction form
    311.88/467.76 = 167.64/x
  3. Step 3: Cross multiply
    311.88x = 467.76 × 167.64
  4. Step 4: Simplify right side
    311.88x = 78,415.29
  5. Step 5: Solve for x
    x = 78,415.29/311.88
  6. Step 6: Final answer
    x = 251.43

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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.