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Finding the Fourth Proportional to 276.75, 382.12 and 203.18

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Solution

The fourth proportional to 276.75, 382.12 and 203.18 is: 280.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.75 : 382.12 = 203.18 : x
  2. Step 2: Convert to fraction form
    276.75/382.12 = 203.18/x
  3. Step 3: Cross multiply
    276.75x = 382.12 × 203.18
  4. Step 4: Simplify right side
    276.75x = 77,636.72
  5. Step 5: Solve for x
    x = 77,636.72/276.75
  6. Step 6: Final answer
    x = 280.53

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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.