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Finding the Fourth Proportional to 247.14, 371.13 and 221.70

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Solution

The fourth proportional to 247.14, 371.13 and 221.70 is: 332.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.14 : 371.13 = 221.70 : x
  2. Step 2: Convert to fraction form
    247.14/371.13 = 221.70/x
  3. Step 3: Cross multiply
    247.14x = 371.13 × 221.70
  4. Step 4: Simplify right side
    247.14x = 82,279.52
  5. Step 5: Solve for x
    x = 82,279.52/247.14
  6. Step 6: Final answer
    x = 332.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.