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Finding the Fourth Proportional to 396.36, 546.54 and 271.80

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Solution

The fourth proportional to 396.36, 546.54 and 271.80 is: 374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.36 : 546.54 = 271.80 : x
  2. Step 2: Convert to fraction form
    396.36/546.54 = 271.80/x
  3. Step 3: Cross multiply
    396.36x = 546.54 × 271.80
  4. Step 4: Simplify right side
    396.36x = 148,549.57
  5. Step 5: Solve for x
    x = 148,549.57/396.36
  6. Step 6: Final answer
    x = 374.78

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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.