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Finding the Fourth Proportional to 276.64, 381.76 and 158.53

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Solution

The fourth proportional to 276.64, 381.76 and 158.53 is: 218.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.64 : 381.76 = 158.53 : x
  2. Step 2: Convert to fraction form
    276.64/381.76 = 158.53/x
  3. Step 3: Cross multiply
    276.64x = 381.76 × 158.53
  4. Step 4: Simplify right side
    276.64x = 60,520.49
  5. Step 5: Solve for x
    x = 60,520.49/276.64
  6. Step 6: Final answer
    x = 218.77

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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.