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Finding the Fourth Proportional to 303.38, 418.55 and 198.44

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Solution

The fourth proportional to 303.38, 418.55 and 198.44 is: 273.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.38 : 418.55 = 198.44 : x
  2. Step 2: Convert to fraction form
    303.38/418.55 = 198.44/x
  3. Step 3: Cross multiply
    303.38x = 418.55 × 198.44
  4. Step 4: Simplify right side
    303.38x = 83,057.06
  5. Step 5: Solve for x
    x = 83,057.06/303.38
  6. Step 6: Final answer
    x = 273.77

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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.