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Finding the Fourth Proportional to 221.43, 306.25 and 198.08

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Solution

The fourth proportional to 221.43, 306.25 and 198.08 is: 273.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.43 : 306.25 = 198.08 : x
  2. Step 2: Convert to fraction form
    221.43/306.25 = 198.08/x
  3. Step 3: Cross multiply
    221.43x = 306.25 × 198.08
  4. Step 4: Simplify right side
    221.43x = 60,661.12
  5. Step 5: Solve for x
    x = 60,661.12/221.43
  6. Step 6: Final answer
    x = 273.95

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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.