Home / 1,989.58-2,745.68-1,105.46

Finding the Fourth Proportional to 1,989.58, 2,745.68 and 1,105.46

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Solution

The fourth proportional to 1,989.58, 2,745.68 and 1,105.46 is: 1,525.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.58 : 2,745.68 = 1,105.46 : x
  2. Step 2: Convert to fraction form
    1,989.58/2,745.68 = 1,105.46/x
  3. Step 3: Cross multiply
    1,989.58x = 2,745.68 × 1,105.46
  4. Step 4: Simplify right side
    1,989.58x = 3,035,239.41
  5. Step 5: Solve for x
    x = 3,035,239.41/1,989.58
  6. Step 6: Final answer
    x = 1,525.57

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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.