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Finding the Fourth Proportional to 276.39, 380.79 and 227.16

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Solution

The fourth proportional to 276.39, 380.79 and 227.16 is: 312.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.39 : 380.79 = 227.16 : x
  2. Step 2: Convert to fraction form
    276.39/380.79 = 227.16/x
  3. Step 3: Cross multiply
    276.39x = 380.79 × 227.16
  4. Step 4: Simplify right side
    276.39x = 86,500.26
  5. Step 5: Solve for x
    x = 86,500.26/276.39
  6. Step 6: Final answer
    x = 312.96

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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.