Home / 2,122.15-3,185.17-1,082.90

Finding the Fourth Proportional to 2,122.15, 3,185.17 and 1,082.90

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Solution

The fourth proportional to 2,122.15, 3,185.17 and 1,082.90 is: 1,625.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.15 : 3,185.17 = 1,082.90 : x
  2. Step 2: Convert to fraction form
    2,122.15/3,185.17 = 1,082.90/x
  3. Step 3: Cross multiply
    2,122.15x = 3,185.17 × 1,082.90
  4. Step 4: Simplify right side
    2,122.15x = 3,449,199.25
  5. Step 5: Solve for x
    x = 3,449,199.25/2,122.15
  6. Step 6: Final answer
    x = 1,625.33

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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.