Home / 2,141.20-3,211.53-679.96

Finding the Fourth Proportional to 2,141.20, 3,211.53 and 679.96

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Solution

The fourth proportional to 2,141.20, 3,211.53 and 679.96 is: 1,019.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.20 : 3,211.53 = 679.96 : x
  2. Step 2: Convert to fraction form
    2,141.20/3,211.53 = 679.96/x
  3. Step 3: Cross multiply
    2,141.20x = 3,211.53 × 679.96
  4. Step 4: Simplify right side
    2,141.20x = 2,183,711.94
  5. Step 5: Solve for x
    x = 2,183,711.94/2,141.20
  6. Step 6: Final answer
    x = 1,019.85

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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.