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Finding the Fourth Proportional to 396.54, 594.41 and 213.89

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Solution

The fourth proportional to 396.54, 594.41 and 213.89 is: 320.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.54 : 594.41 = 213.89 : x
  2. Step 2: Convert to fraction form
    396.54/594.41 = 213.89/x
  3. Step 3: Cross multiply
    396.54x = 594.41 × 213.89
  4. Step 4: Simplify right side
    396.54x = 127,134.31
  5. Step 5: Solve for x
    x = 127,134.31/396.54
  6. Step 6: Final answer
    x = 320.61

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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.