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Finding the Fourth Proportional to 286.23, 391.84 and 276.92

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Solution

The fourth proportional to 286.23, 391.84 and 276.92 is: 379.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.23 : 391.84 = 276.92 : x
  2. Step 2: Convert to fraction form
    286.23/391.84 = 276.92/x
  3. Step 3: Cross multiply
    286.23x = 391.84 × 276.92
  4. Step 4: Simplify right side
    286.23x = 108,507.15
  5. Step 5: Solve for x
    x = 108,507.15/286.23
  6. Step 6: Final answer
    x = 379.09

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.