Home / 1,989.22-2,745.36-1,192.78

Finding the Fourth Proportional to 1,989.22, 2,745.36 and 1,192.78

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Solution

The fourth proportional to 1,989.22, 2,745.36 and 1,192.78 is: 1,646.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.22 : 2,745.36 = 1,192.78 : x
  2. Step 2: Convert to fraction form
    1,989.22/2,745.36 = 1,192.78/x
  3. Step 3: Cross multiply
    1,989.22x = 2,745.36 × 1,192.78
  4. Step 4: Simplify right side
    1,989.22x = 3,274,610.50
  5. Step 5: Solve for x
    x = 3,274,610.50/1,989.22
  6. Step 6: Final answer
    x = 1,646.18

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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.