Home / 1,982.82-2,736.41-1,143.68

Finding the Fourth Proportional to 1,982.82, 2,736.41 and 1,143.68

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Solution

The fourth proportional to 1,982.82, 2,736.41 and 1,143.68 is: 1,578.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.82 : 2,736.41 = 1,143.68 : x
  2. Step 2: Convert to fraction form
    1,982.82/2,736.41 = 1,143.68/x
  3. Step 3: Cross multiply
    1,982.82x = 2,736.41 × 1,143.68
  4. Step 4: Simplify right side
    1,982.82x = 3,129,566.57
  5. Step 5: Solve for x
    x = 3,129,566.57/1,982.82
  6. Step 6: Final answer
    x = 1,578.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.