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Finding the Fourth Proportional to 276.76, 381.70 and 198.04

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Solution

The fourth proportional to 276.76, 381.70 and 198.04 is: 273.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.76 : 381.70 = 198.04 : x
  2. Step 2: Convert to fraction form
    276.76/381.70 = 198.04/x
  3. Step 3: Cross multiply
    276.76x = 381.70 × 198.04
  4. Step 4: Simplify right side
    276.76x = 75,591.87
  5. Step 5: Solve for x
    x = 75,591.87/276.76
  6. Step 6: Final answer
    x = 273.13

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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.