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Finding the Fourth Proportional to 234.28, 351.18 and 131.61

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Solution

The fourth proportional to 234.28, 351.18 and 131.61 is: 197.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.28 : 351.18 = 131.61 : x
  2. Step 2: Convert to fraction form
    234.28/351.18 = 131.61/x
  3. Step 3: Cross multiply
    234.28x = 351.18 × 131.61
  4. Step 4: Simplify right side
    234.28x = 46,218.14
  5. Step 5: Solve for x
    x = 46,218.14/234.28
  6. Step 6: Final answer
    x = 197.28

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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.