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Finding the Fourth Proportional to 229.54, 316.86 and 149.82

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Solution

The fourth proportional to 229.54, 316.86 and 149.82 is: 206.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.54 : 316.86 = 149.82 : x
  2. Step 2: Convert to fraction form
    229.54/316.86 = 149.82/x
  3. Step 3: Cross multiply
    229.54x = 316.86 × 149.82
  4. Step 4: Simplify right side
    229.54x = 47,471.97
  5. Step 5: Solve for x
    x = 47,471.97/229.54
  6. Step 6: Final answer
    x = 206.81

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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.