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Finding the Fourth Proportional to 396.67, 544.47 and 379.76

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Solution

The fourth proportional to 396.67, 544.47 and 379.76 is: 521.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.67 : 544.47 = 379.76 : x
  2. Step 2: Convert to fraction form
    396.67/544.47 = 379.76/x
  3. Step 3: Cross multiply
    396.67x = 544.47 × 379.76
  4. Step 4: Simplify right side
    396.67x = 206,765.20
  5. Step 5: Solve for x
    x = 206,765.20/396.67
  6. Step 6: Final answer
    x = 521.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.