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Finding the Fourth Proportional to 322.45, 445.01 and 198.12

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Solution

The fourth proportional to 322.45, 445.01 and 198.12 is: 273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.45 : 445.01 = 198.12 : x
  2. Step 2: Convert to fraction form
    322.45/445.01 = 198.12/x
  3. Step 3: Cross multiply
    322.45x = 445.01 × 198.12
  4. Step 4: Simplify right side
    322.45x = 88,165.38
  5. Step 5: Solve for x
    x = 88,165.38/322.45
  6. Step 6: Final answer
    x = 273.42

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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.