Home / 2,181.74-3,273.11-720.80

Finding the Fourth Proportional to 2,181.74, 3,273.11 and 720.80

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Solution

The fourth proportional to 2,181.74, 3,273.11 and 720.80 is: 1,081.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.74 : 3,273.11 = 720.80 : x
  2. Step 2: Convert to fraction form
    2,181.74/3,273.11 = 720.80/x
  3. Step 3: Cross multiply
    2,181.74x = 3,273.11 × 720.80
  4. Step 4: Simplify right side
    2,181.74x = 2,359,252.70
  5. Step 5: Solve for x
    x = 2,359,252.70/2,181.74
  6. Step 6: Final answer
    x = 1,081.37

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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.