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Finding the Fourth Proportional to 396.98, 595.28 and 140.42

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Solution

The fourth proportional to 396.98, 595.28 and 140.42 is: 210.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.98 : 595.28 = 140.42 : x
  2. Step 2: Convert to fraction form
    396.98/595.28 = 140.42/x
  3. Step 3: Cross multiply
    396.98x = 595.28 × 140.42
  4. Step 4: Simplify right side
    396.98x = 83,589.22
  5. Step 5: Solve for x
    x = 83,589.22/396.98
  6. Step 6: Final answer
    x = 210.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.