Home / 2,781.91-4,172.86-2,231.38

Finding the Fourth Proportional to 2,781.91, 4,172.86 and 2,231.38

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Solution

The fourth proportional to 2,781.91, 4,172.86 and 2,231.38 is: 3,347.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.91 : 4,172.86 = 2,231.38 : x
  2. Step 2: Convert to fraction form
    2,781.91/4,172.86 = 2,231.38/x
  3. Step 3: Cross multiply
    2,781.91x = 4,172.86 × 2,231.38
  4. Step 4: Simplify right side
    2,781.91x = 9,311,228.70
  5. Step 5: Solve for x
    x = 9,311,228.70/2,781.91
  6. Step 6: Final answer
    x = 3,347.07

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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.