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Finding the Fourth Proportional to 276.11, 381.06 and 159.65

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Solution

The fourth proportional to 276.11, 381.06 and 159.65 is: 220.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.11 : 381.06 = 159.65 : x
  2. Step 2: Convert to fraction form
    276.11/381.06 = 159.65/x
  3. Step 3: Cross multiply
    276.11x = 381.06 × 159.65
  4. Step 4: Simplify right side
    276.11x = 60,834.32
  5. Step 5: Solve for x
    x = 60,834.32/276.11
  6. Step 6: Final answer
    x = 220.33

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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.