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Finding the Fourth Proportional to 276.45, 380.99 and 268.55

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Solution

The fourth proportional to 276.45, 380.99 and 268.55 is: 370.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.45 : 380.99 = 268.55 : x
  2. Step 2: Convert to fraction form
    276.45/380.99 = 268.55/x
  3. Step 3: Cross multiply
    276.45x = 380.99 × 268.55
  4. Step 4: Simplify right side
    276.45x = 102,311.62
  5. Step 5: Solve for x
    x = 102,311.62/276.45
  6. Step 6: Final answer
    x = 370.09

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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.