Home / 3,491.20-5,236.80-2,108.80

Finding the Fourth Proportional to 3,491.20, 5,236.80 and 2,108.80

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Solution

The fourth proportional to 3,491.20, 5,236.80 and 2,108.80 is: 3,163.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.20 : 5,236.80 = 2,108.80 : x
  2. Step 2: Convert to fraction form
    3,491.20/5,236.80 = 2,108.80/x
  3. Step 3: Cross multiply
    3,491.20x = 5,236.80 × 2,108.80
  4. Step 4: Simplify right side
    3,491.20x = 11,043,363.84
  5. Step 5: Solve for x
    x = 11,043,363.84/3,491.20
  6. Step 6: Final answer
    x = 3,163.20

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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.