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Finding the Fourth Proportional to 229.37, 316.49 and 129.79

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Solution

The fourth proportional to 229.37, 316.49 and 129.79 is: 179.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.37 : 316.49 = 129.79 : x
  2. Step 2: Convert to fraction form
    229.37/316.49 = 129.79/x
  3. Step 3: Cross multiply
    229.37x = 316.49 × 129.79
  4. Step 4: Simplify right side
    229.37x = 41,077.24
  5. Step 5: Solve for x
    x = 41,077.24/229.37
  6. Step 6: Final answer
    x = 179.09

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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.