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Finding the Fourth Proportional to 276.28, 380.40 and 234.74

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Solution

The fourth proportional to 276.28, 380.40 and 234.74 is: 323.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.28 : 380.40 = 234.74 : x
  2. Step 2: Convert to fraction form
    276.28/380.40 = 234.74/x
  3. Step 3: Cross multiply
    276.28x = 380.40 × 234.74
  4. Step 4: Simplify right side
    276.28x = 89,295.10
  5. Step 5: Solve for x
    x = 89,295.10/276.28
  6. Step 6: Final answer
    x = 323.21

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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.