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Finding the Fourth Proportional to 276.18, 381.07 and 158.13

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Solution

The fourth proportional to 276.18, 381.07 and 158.13 is: 218.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.18 : 381.07 = 158.13 : x
  2. Step 2: Convert to fraction form
    276.18/381.07 = 158.13/x
  3. Step 3: Cross multiply
    276.18x = 381.07 × 158.13
  4. Step 4: Simplify right side
    276.18x = 60,258.80
  5. Step 5: Solve for x
    x = 60,258.80/276.18
  6. Step 6: Final answer
    x = 218.19

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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.