Home / 2,822.12-4,239.66-1,991.09

Finding the Fourth Proportional to 2,822.12, 4,239.66 and 1,991.09

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Solution

The fourth proportional to 2,822.12, 4,239.66 and 1,991.09 is: 2,991.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,822.12 : 4,239.66 = 1,991.09 : x
  2. Step 2: Convert to fraction form
    2,822.12/4,239.66 = 1,991.09/x
  3. Step 3: Cross multiply
    2,822.12x = 4,239.66 × 1,991.09
  4. Step 4: Simplify right side
    2,822.12x = 8,441,562.70
  5. Step 5: Solve for x
    x = 8,441,562.70/2,822.12
  6. Step 6: Final answer
    x = 2,991.21

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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.