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Finding the Fourth Proportional to 276.12, 380.88 and 171.12

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Solution

The fourth proportional to 276.12, 380.88 and 171.12 is: 236.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.12 : 380.88 = 171.12 : x
  2. Step 2: Convert to fraction form
    276.12/380.88 = 171.12/x
  3. Step 3: Cross multiply
    276.12x = 380.88 × 171.12
  4. Step 4: Simplify right side
    276.12x = 65,176.19
  5. Step 5: Solve for x
    x = 65,176.19/276.12
  6. Step 6: Final answer
    x = 236.04

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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.