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Finding the Fourth Proportional to 276.07, 380.90 and 171.25

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Solution

The fourth proportional to 276.07, 380.90 and 171.25 is: 236.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.07 : 380.90 = 171.25 : x
  2. Step 2: Convert to fraction form
    276.07/380.90 = 171.25/x
  3. Step 3: Cross multiply
    276.07x = 380.90 × 171.25
  4. Step 4: Simplify right side
    276.07x = 65,229.13
  5. Step 5: Solve for x
    x = 65,229.13/276.07
  6. Step 6: Final answer
    x = 236.28

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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.