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Finding the Fourth Proportional to 234.61, 351.91 and 131.74

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Solution

The fourth proportional to 234.61, 351.91 and 131.74 is: 197.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.61 : 351.91 = 131.74 : x
  2. Step 2: Convert to fraction form
    234.61/351.91 = 131.74/x
  3. Step 3: Cross multiply
    234.61x = 351.91 × 131.74
  4. Step 4: Simplify right side
    234.61x = 46,360.62
  5. Step 5: Solve for x
    x = 46,360.62/234.61
  6. Step 6: Final answer
    x = 197.61

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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.