Home / 2,119.42-3,179.11-819.98

Finding the Fourth Proportional to 2,119.42, 3,179.11 and 819.98

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Solution

The fourth proportional to 2,119.42, 3,179.11 and 819.98 is: 1,229.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.42 : 3,179.11 = 819.98 : x
  2. Step 2: Convert to fraction form
    2,119.42/3,179.11 = 819.98/x
  3. Step 3: Cross multiply
    2,119.42x = 3,179.11 × 819.98
  4. Step 4: Simplify right side
    2,119.42x = 2,606,806.62
  5. Step 5: Solve for x
    x = 2,606,806.62/2,119.42
  6. Step 6: Final answer
    x = 1,229.96

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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.