Home / 1,989.43-2,745.37-1,105.22

Finding the Fourth Proportional to 1,989.43, 2,745.37 and 1,105.22

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Solution

The fourth proportional to 1,989.43, 2,745.37 and 1,105.22 is: 1,525.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.43 : 2,745.37 = 1,105.22 : x
  2. Step 2: Convert to fraction form
    1,989.43/2,745.37 = 1,105.22/x
  3. Step 3: Cross multiply
    1,989.43x = 2,745.37 × 1,105.22
  4. Step 4: Simplify right side
    1,989.43x = 3,034,246.08
  5. Step 5: Solve for x
    x = 3,034,246.08/1,989.43
  6. Step 6: Final answer
    x = 1,525.19

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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.