Home / 2,821.70-4,228.43-2,665.90

Finding the Fourth Proportional to 2,821.70, 4,228.43 and 2,665.90

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Solution

The fourth proportional to 2,821.70, 4,228.43 and 2,665.90 is: 3,994.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.70 : 4,228.43 = 2,665.90 : x
  2. Step 2: Convert to fraction form
    2,821.70/4,228.43 = 2,665.90/x
  3. Step 3: Cross multiply
    2,821.70x = 4,228.43 × 2,665.90
  4. Step 4: Simplify right side
    2,821.70x = 11,272,571.54
  5. Step 5: Solve for x
    x = 11,272,571.54/2,821.70
  6. Step 6: Final answer
    x = 3,994.96

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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.