Home / 2,141.03-3,211.21-679.86

Finding the Fourth Proportional to 2,141.03, 3,211.21 and 679.86

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Solution

The fourth proportional to 2,141.03, 3,211.21 and 679.86 is: 1,019.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.03 : 3,211.21 = 679.86 : x
  2. Step 2: Convert to fraction form
    2,141.03/3,211.21 = 679.86/x
  3. Step 3: Cross multiply
    2,141.03x = 3,211.21 × 679.86
  4. Step 4: Simplify right side
    2,141.03x = 2,183,174.08
  5. Step 5: Solve for x
    x = 2,183,174.08/2,141.03
  6. Step 6: Final answer
    x = 1,019.68

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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.