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Finding the Fourth Proportional to 227.54, 313.97 and 129.26

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Solution

The fourth proportional to 227.54, 313.97 and 129.26 is: 178.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.54 : 313.97 = 129.26 : x
  2. Step 2: Convert to fraction form
    227.54/313.97 = 129.26/x
  3. Step 3: Cross multiply
    227.54x = 313.97 × 129.26
  4. Step 4: Simplify right side
    227.54x = 40,583.76
  5. Step 5: Solve for x
    x = 40,583.76/227.54
  6. Step 6: Final answer
    x = 178.36

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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.