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Finding the Fourth Proportional to 229.20, 316.62 and 171.69

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Solution

The fourth proportional to 229.20, 316.62 and 171.69 is: 237.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.20 : 316.62 = 171.69 : x
  2. Step 2: Convert to fraction form
    229.20/316.62 = 171.69/x
  3. Step 3: Cross multiply
    229.20x = 316.62 × 171.69
  4. Step 4: Simplify right side
    229.20x = 54,360.49
  5. Step 5: Solve for x
    x = 54,360.49/229.20
  6. Step 6: Final answer
    x = 237.17

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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.