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Finding the Fourth Proportional to 227.21, 313.56 and 123.71

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Solution

The fourth proportional to 227.21, 313.56 and 123.71 is: 170.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.21 : 313.56 = 123.71 : x
  2. Step 2: Convert to fraction form
    227.21/313.56 = 123.71/x
  3. Step 3: Cross multiply
    227.21x = 313.56 × 123.71
  4. Step 4: Simplify right side
    227.21x = 38,789.89
  5. Step 5: Solve for x
    x = 38,789.89/227.21
  6. Step 6: Final answer
    x = 170.72

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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.