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Finding the Fourth Proportional to 229.32, 316.49 and 131.09

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Solution

The fourth proportional to 229.32, 316.49 and 131.09 is: 180.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.32 : 316.49 = 131.09 : x
  2. Step 2: Convert to fraction form
    229.32/316.49 = 131.09/x
  3. Step 3: Cross multiply
    229.32x = 316.49 × 131.09
  4. Step 4: Simplify right side
    229.32x = 41,486.44
  5. Step 5: Solve for x
    x = 41,486.44/229.32
  6. Step 6: Final answer
    x = 180.91

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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.