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Finding the Fourth Proportional to 276.88, 382.14 and 189.48

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Solution

The fourth proportional to 276.88, 382.14 and 189.48 is: 261.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.88 : 382.14 = 189.48 : x
  2. Step 2: Convert to fraction form
    276.88/382.14 = 189.48/x
  3. Step 3: Cross multiply
    276.88x = 382.14 × 189.48
  4. Step 4: Simplify right side
    276.88x = 72,407.89
  5. Step 5: Solve for x
    x = 72,407.89/276.88
  6. Step 6: Final answer
    x = 261.51

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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.