Home / 3,208.75-4,431.72-2,158.99

Finding the Fourth Proportional to 3,208.75, 4,431.72 and 2,158.99

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Solution

The fourth proportional to 3,208.75, 4,431.72 and 2,158.99 is: 2,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208.75 : 4,431.72 = 2,158.99 : x
  2. Step 2: Convert to fraction form
    3,208.75/4,431.72 = 2,158.99/x
  3. Step 3: Cross multiply
    3,208.75x = 4,431.72 × 2,158.99
  4. Step 4: Simplify right side
    3,208.75x = 9,568,039.16
  5. Step 5: Solve for x
    x = 9,568,039.16/3,208.75
  6. Step 6: Final answer
    x = 2,981.86

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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.