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Finding the Fourth Proportional to 227.55, 314.01 and 129.31

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Solution

The fourth proportional to 227.55, 314.01 and 129.31 is: 178.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.55 : 314.01 = 129.31 : x
  2. Step 2: Convert to fraction form
    227.55/314.01 = 129.31/x
  3. Step 3: Cross multiply
    227.55x = 314.01 × 129.31
  4. Step 4: Simplify right side
    227.55x = 40,604.63
  5. Step 5: Solve for x
    x = 40,604.63/227.55
  6. Step 6: Final answer
    x = 178.44

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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.