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Finding the Fourth Proportional to 276.96, 382.08 and 189.48

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Solution

The fourth proportional to 276.96, 382.08 and 189.48 is: 261.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.96 : 382.08 = 189.48 : x
  2. Step 2: Convert to fraction form
    276.96/382.08 = 189.48/x
  3. Step 3: Cross multiply
    276.96x = 382.08 × 189.48
  4. Step 4: Simplify right side
    276.96x = 72,396.52
  5. Step 5: Solve for x
    x = 72,396.52/276.96
  6. Step 6: Final answer
    x = 261.40

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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.