Home / 1,989.73-2,745.84-1,105.54

Finding the Fourth Proportional to 1,989.73, 2,745.84 and 1,105.54

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Solution

The fourth proportional to 1,989.73, 2,745.84 and 1,105.54 is: 1,525.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.73 : 2,745.84 = 1,105.54 : x
  2. Step 2: Convert to fraction form
    1,989.73/2,745.84 = 1,105.54/x
  3. Step 3: Cross multiply
    1,989.73x = 2,745.84 × 1,105.54
  4. Step 4: Simplify right side
    1,989.73x = 3,035,635.95
  5. Step 5: Solve for x
    x = 3,035,635.95/1,989.73
  6. Step 6: Final answer
    x = 1,525.65

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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.