Home / 1,989.24-2,745.09-1,105.02

Finding the Fourth Proportional to 1,989.24, 2,745.09 and 1,105.02

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Solution

The fourth proportional to 1,989.24, 2,745.09 and 1,105.02 is: 1,524.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.24 : 2,745.09 = 1,105.02 : x
  2. Step 2: Convert to fraction form
    1,989.24/2,745.09 = 1,105.02/x
  3. Step 3: Cross multiply
    1,989.24x = 2,745.09 × 1,105.02
  4. Step 4: Simplify right side
    1,989.24x = 3,033,379.35
  5. Step 5: Solve for x
    x = 3,033,379.35/1,989.24
  6. Step 6: Final answer
    x = 1,524.89

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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.