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Finding the Fourth Proportional to 394.38, 591.72 and 163.38

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Solution

The fourth proportional to 394.38, 591.72 and 163.38 is: 245.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.38 : 591.72 = 163.38 : x
  2. Step 2: Convert to fraction form
    394.38/591.72 = 163.38/x
  3. Step 3: Cross multiply
    394.38x = 591.72 × 163.38
  4. Step 4: Simplify right side
    394.38x = 96,675.21
  5. Step 5: Solve for x
    x = 96,675.21/394.38
  6. Step 6: Final answer
    x = 245.13

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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.