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Finding the Fourth Proportional to 394.97, 591.23 and 308.55

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Solution

The fourth proportional to 394.97, 591.23 and 308.55 is: 461.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.97 : 591.23 = 308.55 : x
  2. Step 2: Convert to fraction form
    394.97/591.23 = 308.55/x
  3. Step 3: Cross multiply
    394.97x = 591.23 × 308.55
  4. Step 4: Simplify right side
    394.97x = 182,422.47
  5. Step 5: Solve for x
    x = 182,422.47/394.97
  6. Step 6: Final answer
    x = 461.87

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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.