Home / 2,310.80-3,185.26-2,120.12

Finding the Fourth Proportional to 2,310.80, 3,185.26 and 2,120.12

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Solution

The fourth proportional to 2,310.80, 3,185.26 and 2,120.12 is: 2,922.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,310.80 : 3,185.26 = 2,120.12 : x
  2. Step 2: Convert to fraction form
    2,310.80/3,185.26 = 2,120.12/x
  3. Step 3: Cross multiply
    2,310.80x = 3,185.26 × 2,120.12
  4. Step 4: Simplify right side
    2,310.80x = 6,753,133.43
  5. Step 5: Solve for x
    x = 6,753,133.43/2,310.80
  6. Step 6: Final answer
    x = 2,922.42

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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.