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Finding the Fourth Proportional to 276.81, 379.84 and 252.30

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Solution

The fourth proportional to 276.81, 379.84 and 252.30 is: 346.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.81 : 379.84 = 252.30 : x
  2. Step 2: Convert to fraction form
    276.81/379.84 = 252.30/x
  3. Step 3: Cross multiply
    276.81x = 379.84 × 252.30
  4. Step 4: Simplify right side
    276.81x = 95,833.63
  5. Step 5: Solve for x
    x = 95,833.63/276.81
  6. Step 6: Final answer
    x = 346.21

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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.