Home / 1,821.57-2,728.25-1,276.19

Finding the Fourth Proportional to 1,821.57, 2,728.25 and 1,276.19

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Solution

The fourth proportional to 1,821.57, 2,728.25 and 1,276.19 is: 1,911.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.57 : 2,728.25 = 1,276.19 : x
  2. Step 2: Convert to fraction form
    1,821.57/2,728.25 = 1,276.19/x
  3. Step 3: Cross multiply
    1,821.57x = 2,728.25 × 1,276.19
  4. Step 4: Simplify right side
    1,821.57x = 3,481,771.62
  5. Step 5: Solve for x
    x = 3,481,771.62/1,821.57
  6. Step 6: Final answer
    x = 1,911.41

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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.