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Finding the Fourth Proportional to 396.27, 549.39 and 374.40

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Solution

The fourth proportional to 396.27, 549.39 and 374.40 is: 519.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.27 : 549.39 = 374.40 : x
  2. Step 2: Convert to fraction form
    396.27/549.39 = 374.40/x
  3. Step 3: Cross multiply
    396.27x = 549.39 × 374.40
  4. Step 4: Simplify right side
    396.27x = 205,691.62
  5. Step 5: Solve for x
    x = 205,691.62/396.27
  6. Step 6: Final answer
    x = 519.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.