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Finding the Fourth Proportional to 251.28, 347.09 and 226.71

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Solution

The fourth proportional to 251.28, 347.09 and 226.71 is: 313.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.28 : 347.09 = 226.71 : x
  2. Step 2: Convert to fraction form
    251.28/347.09 = 226.71/x
  3. Step 3: Cross multiply
    251.28x = 347.09 × 226.71
  4. Step 4: Simplify right side
    251.28x = 78,687.64
  5. Step 5: Solve for x
    x = 78,687.64/251.28
  6. Step 6: Final answer
    x = 313.15

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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.