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Finding the Fourth Proportional to 229.11, 316.02 and 141.72

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Solution

The fourth proportional to 229.11, 316.02 and 141.72 is: 195.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.11 : 316.02 = 141.72 : x
  2. Step 2: Convert to fraction form
    229.11/316.02 = 141.72/x
  3. Step 3: Cross multiply
    229.11x = 316.02 × 141.72
  4. Step 4: Simplify right side
    229.11x = 44,786.35
  5. Step 5: Solve for x
    x = 44,786.35/229.11
  6. Step 6: Final answer
    x = 195.48

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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.