Home / 3,183.75-4,395.74-1,989.20

Finding the Fourth Proportional to 3,183.75, 4,395.74 and 1,989.20

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Solution

The fourth proportional to 3,183.75, 4,395.74 and 1,989.20 is: 2,746.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,183.75 : 4,395.74 = 1,989.20 : x
  2. Step 2: Convert to fraction form
    3,183.75/4,395.74 = 1,989.20/x
  3. Step 3: Cross multiply
    3,183.75x = 4,395.74 × 1,989.20
  4. Step 4: Simplify right side
    3,183.75x = 8,743,974.08
  5. Step 5: Solve for x
    x = 8,743,974.08/3,183.75
  6. Step 6: Final answer
    x = 2,746.44

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1.5x scale

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.