Home / 2,690.10-4,028.67-1,821.78

Finding the Fourth Proportional to 2,690.10, 4,028.67 and 1,821.78

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Solution

The fourth proportional to 2,690.10, 4,028.67 and 1,821.78 is: 2,728.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.10 : 4,028.67 = 1,821.78 : x
  2. Step 2: Convert to fraction form
    2,690.10/4,028.67 = 1,821.78/x
  3. Step 3: Cross multiply
    2,690.10x = 4,028.67 × 1,821.78
  4. Step 4: Simplify right side
    2,690.10x = 7,339,350.43
  5. Step 5: Solve for x
    x = 7,339,350.43/2,690.10
  6. Step 6: Final answer
    x = 2,728.28

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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.