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Finding the Fourth Proportional to 276.61, 381.54 and 193.75

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Solution

The fourth proportional to 276.61, 381.54 and 193.75 is: 267.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.61 : 381.54 = 193.75 : x
  2. Step 2: Convert to fraction form
    276.61/381.54 = 193.75/x
  3. Step 3: Cross multiply
    276.61x = 381.54 × 193.75
  4. Step 4: Simplify right side
    276.61x = 73,923.38
  5. Step 5: Solve for x
    x = 73,923.38/276.61
  6. Step 6: Final answer
    x = 267.25

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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.