Home / 1,989.93-2,745.99-1,105.74

Finding the Fourth Proportional to 1,989.93, 2,745.99 and 1,105.74

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Solution

The fourth proportional to 1,989.93, 2,745.99 and 1,105.74 is: 1,525.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.93 : 2,745.99 = 1,105.74 : x
  2. Step 2: Convert to fraction form
    1,989.93/2,745.99 = 1,105.74/x
  3. Step 3: Cross multiply
    1,989.93x = 2,745.99 × 1,105.74
  4. Step 4: Simplify right side
    1,989.93x = 3,036,350.98
  5. Step 5: Solve for x
    x = 3,036,350.98/1,989.93
  6. Step 6: Final answer
    x = 1,525.86

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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.