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Finding the Fourth Proportional to 276.75, 380.70 and 243.95

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Solution

The fourth proportional to 276.75, 380.70 and 243.95 is: 335.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.75 : 380.70 = 243.95 : x
  2. Step 2: Convert to fraction form
    276.75/380.70 = 243.95/x
  3. Step 3: Cross multiply
    276.75x = 380.70 × 243.95
  4. Step 4: Simplify right side
    276.75x = 92,869.86
  5. Step 5: Solve for x
    x = 92,869.86/276.75
  6. Step 6: Final answer
    x = 335.57

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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.