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Finding the Fourth Proportional to 396.85, 547.54 and 239.44

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Solution

The fourth proportional to 396.85, 547.54 and 239.44 is: 330.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.85 : 547.54 = 239.44 : x
  2. Step 2: Convert to fraction form
    396.85/547.54 = 239.44/x
  3. Step 3: Cross multiply
    396.85x = 547.54 × 239.44
  4. Step 4: Simplify right side
    396.85x = 131,102.98
  5. Step 5: Solve for x
    x = 131,102.98/396.85
  6. Step 6: Final answer
    x = 330.36

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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.