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Finding the Fourth Proportional to 322.17, 445.41 and 248.73

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Solution

The fourth proportional to 322.17, 445.41 and 248.73 is: 343.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.17 : 445.41 = 248.73 : x
  2. Step 2: Convert to fraction form
    322.17/445.41 = 248.73/x
  3. Step 3: Cross multiply
    322.17x = 445.41 × 248.73
  4. Step 4: Simplify right side
    322.17x = 110,786.83
  5. Step 5: Solve for x
    x = 110,786.83/322.17
  6. Step 6: Final answer
    x = 343.88

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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.