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Finding the Fourth Proportional to 394.60, 591.92 and 272.76

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Solution

The fourth proportional to 394.60, 591.92 and 272.76 is: 409.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.60 : 591.92 = 272.76 : x
  2. Step 2: Convert to fraction form
    394.60/591.92 = 272.76/x
  3. Step 3: Cross multiply
    394.60x = 591.92 × 272.76
  4. Step 4: Simplify right side
    394.60x = 161,452.10
  5. Step 5: Solve for x
    x = 161,452.10/394.60
  6. Step 6: Final answer
    x = 409.15

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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.