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Finding the Fourth Proportional to 394.97, 545.18 and 229.34

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Solution

The fourth proportional to 394.97, 545.18 and 229.34 is: 316.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.97 : 545.18 = 229.34 : x
  2. Step 2: Convert to fraction form
    394.97/545.18 = 229.34/x
  3. Step 3: Cross multiply
    394.97x = 545.18 × 229.34
  4. Step 4: Simplify right side
    394.97x = 125,031.58
  5. Step 5: Solve for x
    x = 125,031.58/394.97
  6. Step 6: Final answer
    x = 316.56

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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.