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Finding the Fourth Proportional to 394.27, 591.42 and 316.88

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Solution

The fourth proportional to 394.27, 591.42 and 316.88 is: 475.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.27 : 591.42 = 316.88 : x
  2. Step 2: Convert to fraction form
    394.27/591.42 = 316.88/x
  3. Step 3: Cross multiply
    394.27x = 591.42 × 316.88
  4. Step 4: Simplify right side
    394.27x = 187,409.62
  5. Step 5: Solve for x
    x = 187,409.62/394.27
  6. Step 6: Final answer
    x = 475.34

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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.