Home / 2,082.20-3,125.70-1,261.40

Finding the Fourth Proportional to 2,082.20, 3,125.70 and 1,261.40

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Solution

The fourth proportional to 2,082.20, 3,125.70 and 1,261.40 is: 1,893.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.20 : 3,125.70 = 1,261.40 : x
  2. Step 2: Convert to fraction form
    2,082.20/3,125.70 = 1,261.40/x
  3. Step 3: Cross multiply
    2,082.20x = 3,125.70 × 1,261.40
  4. Step 4: Simplify right side
    2,082.20x = 3,942,757.98
  5. Step 5: Solve for x
    x = 3,942,757.98/2,082.20
  6. Step 6: Final answer
    x = 1,893.55

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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.