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Finding the Fourth Proportional to 396.97, 547.83 and 239.60

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Solution

The fourth proportional to 396.97, 547.83 and 239.60 is: 330.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.97 : 547.83 = 239.60 : x
  2. Step 2: Convert to fraction form
    396.97/547.83 = 239.60/x
  3. Step 3: Cross multiply
    396.97x = 547.83 × 239.60
  4. Step 4: Simplify right side
    396.97x = 131,258.15
  5. Step 5: Solve for x
    x = 131,258.15/396.97
  6. Step 6: Final answer
    x = 330.65

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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.