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Finding the Fourth Proportional to 276.89, 412.43 and 262.85

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Solution

The fourth proportional to 276.89, 412.43 and 262.85 is: 391.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.89 : 412.43 = 262.85 : x
  2. Step 2: Convert to fraction form
    276.89/412.43 = 262.85/x
  3. Step 3: Cross multiply
    276.89x = 412.43 × 262.85
  4. Step 4: Simplify right side
    276.89x = 108,403.85
  5. Step 5: Solve for x
    x = 108,403.85/276.89
  6. Step 6: Final answer
    x = 391.51

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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.