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Finding the Fourth Proportional to 232.70, 348.45 and 221.90

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Solution

The fourth proportional to 232.70, 348.45 and 221.90 is: 332.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.70 : 348.45 = 221.90 : x
  2. Step 2: Convert to fraction form
    232.70/348.45 = 221.90/x
  3. Step 3: Cross multiply
    232.70x = 348.45 × 221.90
  4. Step 4: Simplify right side
    232.70x = 77,321.06
  5. Step 5: Solve for x
    x = 77,321.06/232.70
  6. Step 6: Final answer
    x = 332.28

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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.