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Finding the Fourth Proportional to 396.75, 547.45 and 230.91

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Solution

The fourth proportional to 396.75, 547.45 and 230.91 is: 318.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.75 : 547.45 = 230.91 : x
  2. Step 2: Convert to fraction form
    396.75/547.45 = 230.91/x
  3. Step 3: Cross multiply
    396.75x = 547.45 × 230.91
  4. Step 4: Simplify right side
    396.75x = 126,411.68
  5. Step 5: Solve for x
    x = 126,411.68/396.75
  6. Step 6: Final answer
    x = 318.62

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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.