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Finding the Fourth Proportional to 396.97, 547.56 and 286.27

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Solution

The fourth proportional to 396.97, 547.56 and 286.27 is: 394.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.97 : 547.56 = 286.27 : x
  2. Step 2: Convert to fraction form
    396.97/547.56 = 286.27/x
  3. Step 3: Cross multiply
    396.97x = 547.56 × 286.27
  4. Step 4: Simplify right side
    396.97x = 156,748.63
  5. Step 5: Solve for x
    x = 156,748.63/396.97
  6. Step 6: Final answer
    x = 394.87

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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.