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Finding the Fourth Proportional to 394.36, 591.48 and 163.28

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Solution

The fourth proportional to 394.36, 591.48 and 163.28 is: 244.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.36 : 591.48 = 163.28 : x
  2. Step 2: Convert to fraction form
    394.36/591.48 = 163.28/x
  3. Step 3: Cross multiply
    394.36x = 591.48 × 163.28
  4. Step 4: Simplify right side
    394.36x = 96,576.85
  5. Step 5: Solve for x
    x = 96,576.85/394.36
  6. Step 6: Final answer
    x = 244.90

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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.