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Finding the Fourth Proportional to 234.28, 351.36 and 69.71

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Solution

The fourth proportional to 234.28, 351.36 and 69.71 is: 104.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.28 : 351.36 = 69.71 : x
  2. Step 2: Convert to fraction form
    234.28/351.36 = 69.71/x
  3. Step 3: Cross multiply
    234.28x = 351.36 × 69.71
  4. Step 4: Simplify right side
    234.28x = 24,493.13
  5. Step 5: Solve for x
    x = 24,493.13/234.28
  6. Step 6: Final answer
    x = 104.54

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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.