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Finding the Fourth Proportional to 276.75, 411.72 and 275.82

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Solution

The fourth proportional to 276.75, 411.72 and 275.82 is: 410.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.75 : 411.72 = 275.82 : x
  2. Step 2: Convert to fraction form
    276.75/411.72 = 275.82/x
  3. Step 3: Cross multiply
    276.75x = 411.72 × 275.82
  4. Step 4: Simplify right side
    276.75x = 113,560.61
  5. Step 5: Solve for x
    x = 113,560.61/276.75
  6. Step 6: Final answer
    x = 410.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.