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Finding the Fourth Proportional to 276.50, 381.35 and 193.61

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Solution

The fourth proportional to 276.50, 381.35 and 193.61 is: 267.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.50 : 381.35 = 193.61 : x
  2. Step 2: Convert to fraction form
    276.50/381.35 = 193.61/x
  3. Step 3: Cross multiply
    276.50x = 381.35 × 193.61
  4. Step 4: Simplify right side
    276.50x = 73,834.61
  5. Step 5: Solve for x
    x = 73,834.61/276.50
  6. Step 6: Final answer
    x = 267.03

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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.