Home / 3,909.26-5,390.35-2,491.05

Finding the Fourth Proportional to 3,909.26, 5,390.35 and 2,491.05

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Solution

The fourth proportional to 3,909.26, 5,390.35 and 2,491.05 is: 3,434.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.26 : 5,390.35 = 2,491.05 : x
  2. Step 2: Convert to fraction form
    3,909.26/5,390.35 = 2,491.05/x
  3. Step 3: Cross multiply
    3,909.26x = 5,390.35 × 2,491.05
  4. Step 4: Simplify right side
    3,909.26x = 13,427,645.35
  5. Step 5: Solve for x
    x = 13,427,645.35/3,909.26
  6. Step 6: Final answer
    x = 3,434.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.