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Finding the Fourth Proportional to 229.03, 316.04 and 129.45

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Solution

The fourth proportional to 229.03, 316.04 and 129.45 is: 178.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.03 : 316.04 = 129.45 : x
  2. Step 2: Convert to fraction form
    229.03/316.04 = 129.45/x
  3. Step 3: Cross multiply
    229.03x = 316.04 × 129.45
  4. Step 4: Simplify right side
    229.03x = 40,910.12
  5. Step 5: Solve for x
    x = 40,910.12/229.03
  6. Step 6: Final answer
    x = 178.62

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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.