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Finding the Fourth Proportional to 227.45, 313.90 and 129.23

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Solution

The fourth proportional to 227.45, 313.90 and 129.23 is: 178.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.45 : 313.90 = 129.23 : x
  2. Step 2: Convert to fraction form
    227.45/313.90 = 129.23/x
  3. Step 3: Cross multiply
    227.45x = 313.90 × 129.23
  4. Step 4: Simplify right side
    227.45x = 40,565.30
  5. Step 5: Solve for x
    x = 40,565.30/227.45
  6. Step 6: Final answer
    x = 178.35

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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.