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Finding the Fourth Proportional to 396.83, 547.60 and 222.15

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Solution

The fourth proportional to 396.83, 547.60 and 222.15 is: 306.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.83 : 547.60 = 222.15 : x
  2. Step 2: Convert to fraction form
    396.83/547.60 = 222.15/x
  3. Step 3: Cross multiply
    396.83x = 547.60 × 222.15
  4. Step 4: Simplify right side
    396.83x = 121,648.23
  5. Step 5: Solve for x
    x = 121,648.23/396.83
  6. Step 6: Final answer
    x = 306.55

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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.