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Finding the Fourth Proportional to 229.74, 316.97 and 136.46

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Solution

The fourth proportional to 229.74, 316.97 and 136.46 is: 188.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.74 : 316.97 = 136.46 : x
  2. Step 2: Convert to fraction form
    229.74/316.97 = 136.46/x
  3. Step 3: Cross multiply
    229.74x = 316.97 × 136.46
  4. Step 4: Simplify right side
    229.74x = 43,251.46
  5. Step 5: Solve for x
    x = 43,251.46/229.74
  6. Step 6: Final answer
    x = 188.26

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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.