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Finding the Fourth Proportional to 276.74, 380.28 and 247.58

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Solution

The fourth proportional to 276.74, 380.28 and 247.58 is: 340.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.74 : 380.28 = 247.58 : x
  2. Step 2: Convert to fraction form
    276.74/380.28 = 247.58/x
  3. Step 3: Cross multiply
    276.74x = 380.28 × 247.58
  4. Step 4: Simplify right side
    276.74x = 94,149.72
  5. Step 5: Solve for x
    x = 94,149.72/276.74
  6. Step 6: Final answer
    x = 340.21

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.