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Finding the Fourth Proportional to 396.75, 547.55 and 222.11

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Solution

The fourth proportional to 396.75, 547.55 and 222.11 is: 306.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.75 : 547.55 = 222.11 : x
  2. Step 2: Convert to fraction form
    396.75/547.55 = 222.11/x
  3. Step 3: Cross multiply
    396.75x = 547.55 × 222.11
  4. Step 4: Simplify right side
    396.75x = 121,612.48
  5. Step 5: Solve for x
    x = 121,612.48/396.75
  6. Step 6: Final answer
    x = 306.52

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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.