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Finding the Fourth Proportional to 227.41, 313.82 and 129.16

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Solution

The fourth proportional to 227.41, 313.82 and 129.16 is: 178.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.41 : 313.82 = 129.16 : x
  2. Step 2: Convert to fraction form
    227.41/313.82 = 129.16/x
  3. Step 3: Cross multiply
    227.41x = 313.82 × 129.16
  4. Step 4: Simplify right side
    227.41x = 40,531.56
  5. Step 5: Solve for x
    x = 40,531.56/227.41
  6. Step 6: Final answer
    x = 178.23

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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.