Home / 3,185.85-4,395.37-1,990.02

Finding the Fourth Proportional to 3,185.85, 4,395.37 and 1,990.02

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Solution

The fourth proportional to 3,185.85, 4,395.37 and 1,990.02 is: 2,745.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.85 : 4,395.37 = 1,990.02 : x
  2. Step 2: Convert to fraction form
    3,185.85/4,395.37 = 1,990.02/x
  3. Step 3: Cross multiply
    3,185.85x = 4,395.37 × 1,990.02
  4. Step 4: Simplify right side
    3,185.85x = 8,746,883.24
  5. Step 5: Solve for x
    x = 8,746,883.24/3,185.85
  6. Step 6: Final answer
    x = 2,745.54

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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.