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Finding the Fourth Proportional to 546.95, 819.90 and 272.78

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Solution

The fourth proportional to 546.95, 819.90 and 272.78 is: 408.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.95 : 819.90 = 272.78 : x
  2. Step 2: Convert to fraction form
    546.95/819.90 = 272.78/x
  3. Step 3: Cross multiply
    546.95x = 819.90 × 272.78
  4. Step 4: Simplify right side
    546.95x = 223,651.30
  5. Step 5: Solve for x
    x = 223,651.30/546.95
  6. Step 6: Final answer
    x = 408.90

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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.