Home / 1,989.60-2,745.48-1,105.35

Finding the Fourth Proportional to 1,989.60, 2,745.48 and 1,105.35

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Solution

The fourth proportional to 1,989.60, 2,745.48 and 1,105.35 is: 1,525.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.60 : 2,745.48 = 1,105.35 : x
  2. Step 2: Convert to fraction form
    1,989.60/2,745.48 = 1,105.35/x
  3. Step 3: Cross multiply
    1,989.60x = 2,745.48 × 1,105.35
  4. Step 4: Simplify right side
    1,989.60x = 3,034,716.32
  5. Step 5: Solve for x
    x = 3,034,716.32/1,989.60
  6. Step 6: Final answer
    x = 1,525.29

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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.