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Finding the Fourth Proportional to 229.62, 316.89 and 131.42

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Solution

The fourth proportional to 229.62, 316.89 and 131.42 is: 181.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.62 : 316.89 = 131.42 : x
  2. Step 2: Convert to fraction form
    229.62/316.89 = 131.42/x
  3. Step 3: Cross multiply
    229.62x = 316.89 × 131.42
  4. Step 4: Simplify right side
    229.62x = 41,645.68
  5. Step 5: Solve for x
    x = 41,645.68/229.62
  6. Step 6: Final answer
    x = 181.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.