Home / 2,279.11-3,418.68-818.28

Finding the Fourth Proportional to 2,279.11, 3,418.68 and 818.28

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Solution

The fourth proportional to 2,279.11, 3,418.68 and 818.28 is: 1,227.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.11 : 3,418.68 = 818.28 : x
  2. Step 2: Convert to fraction form
    2,279.11/3,418.68 = 818.28/x
  3. Step 3: Cross multiply
    2,279.11x = 3,418.68 × 818.28
  4. Step 4: Simplify right side
    2,279.11x = 2,797,420.38
  5. Step 5: Solve for x
    x = 2,797,420.38/2,279.11
  6. Step 6: Final answer
    x = 1,227.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.