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Finding the Fourth Proportional to 322.28, 444.65 and 198

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Solution

The fourth proportional to 322.28, 444.65 and 198 is: 273.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.28 : 444.65 = 198 : x
  2. Step 2: Convert to fraction form
    322.28/444.65 = 198/x
  3. Step 3: Cross multiply
    322.28x = 444.65 × 198
  4. Step 4: Simplify right side
    322.28x = 88,040.70
  5. Step 5: Solve for x
    x = 88,040.70/322.28
  6. Step 6: Final answer
    x = 273.18

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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.