Home / 1,912.11-2,638.82-1,439.15

Finding the Fourth Proportional to 1,912.11, 2,638.82 and 1,439.15

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Solution

The fourth proportional to 1,912.11, 2,638.82 and 1,439.15 is: 1,986.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.11 : 2,638.82 = 1,439.15 : x
  2. Step 2: Convert to fraction form
    1,912.11/2,638.82 = 1,439.15/x
  3. Step 3: Cross multiply
    1,912.11x = 2,638.82 × 1,439.15
  4. Step 4: Simplify right side
    1,912.11x = 3,797,657.80
  5. Step 5: Solve for x
    x = 3,797,657.80/1,912.11
  6. Step 6: Final answer
    x = 1,986.11

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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.