Home / 2,660.57-3,987.85-1,099.12

Finding the Fourth Proportional to 2,660.57, 3,987.85 and 1,099.12

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Solution

The fourth proportional to 2,660.57, 3,987.85 and 1,099.12 is: 1,647.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.57 : 3,987.85 = 1,099.12 : x
  2. Step 2: Convert to fraction form
    2,660.57/3,987.85 = 1,099.12/x
  3. Step 3: Cross multiply
    2,660.57x = 3,987.85 × 1,099.12
  4. Step 4: Simplify right side
    2,660.57x = 4,383,125.69
  5. Step 5: Solve for x
    x = 4,383,125.69/2,660.57
  6. Step 6: Final answer
    x = 1,647.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.