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Finding the Fourth Proportional to 396.95, 547.11 and 272.39

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Solution

The fourth proportional to 396.95, 547.11 and 272.39 is: 375.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.95 : 547.11 = 272.39 : x
  2. Step 2: Convert to fraction form
    396.95/547.11 = 272.39/x
  3. Step 3: Cross multiply
    396.95x = 547.11 × 272.39
  4. Step 4: Simplify right side
    396.95x = 149,024.56
  5. Step 5: Solve for x
    x = 149,024.56/396.95
  6. Step 6: Final answer
    x = 375.43

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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.