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Finding the Fourth Proportional to 227.91, 314.51 and 129.68

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Solution

The fourth proportional to 227.91, 314.51 and 129.68 is: 178.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.91 : 314.51 = 129.68 : x
  2. Step 2: Convert to fraction form
    227.91/314.51 = 129.68/x
  3. Step 3: Cross multiply
    227.91x = 314.51 × 129.68
  4. Step 4: Simplify right side
    227.91x = 40,785.66
  5. Step 5: Solve for x
    x = 40,785.66/227.91
  6. Step 6: Final answer
    x = 178.96

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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.