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Finding the Fourth Proportional to 276.45, 381.49 and 152.11

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Solution

The fourth proportional to 276.45, 381.49 and 152.11 is: 209.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.45 : 381.49 = 152.11 : x
  2. Step 2: Convert to fraction form
    276.45/381.49 = 152.11/x
  3. Step 3: Cross multiply
    276.45x = 381.49 × 152.11
  4. Step 4: Simplify right side
    276.45x = 58,028.44
  5. Step 5: Solve for x
    x = 58,028.44/276.45
  6. Step 6: Final answer
    x = 209.91

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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.