Home / 2,609.11-3,911.91-1,375.21

Finding the Fourth Proportional to 2,609.11, 3,911.91 and 1,375.21

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Solution

The fourth proportional to 2,609.11, 3,911.91 and 1,375.21 is: 2,061.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,609.11 : 3,911.91 = 1,375.21 : x
  2. Step 2: Convert to fraction form
    2,609.11/3,911.91 = 1,375.21/x
  3. Step 3: Cross multiply
    2,609.11x = 3,911.91 × 1,375.21
  4. Step 4: Simplify right side
    2,609.11x = 5,379,697.75
  5. Step 5: Solve for x
    x = 5,379,697.75/2,609.11
  6. Step 6: Final answer
    x = 2,061.89

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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.