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Finding the Fourth Proportional to 396.38, 546.97 and 256.34

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Solution

The fourth proportional to 396.38, 546.97 and 256.34 is: 353.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.38 : 546.97 = 256.34 : x
  2. Step 2: Convert to fraction form
    396.38/546.97 = 256.34/x
  3. Step 3: Cross multiply
    396.38x = 546.97 × 256.34
  4. Step 4: Simplify right side
    396.38x = 140,206.27
  5. Step 5: Solve for x
    x = 140,206.27/396.38
  6. Step 6: Final answer
    x = 353.72

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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.