Home / 2,138.75-3,198.86-1,259.16

Finding the Fourth Proportional to 2,138.75, 3,198.86 and 1,259.16

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Solution

The fourth proportional to 2,138.75, 3,198.86 and 1,259.16 is: 1,883.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.75 : 3,198.86 = 1,259.16 : x
  2. Step 2: Convert to fraction form
    2,138.75/3,198.86 = 1,259.16/x
  3. Step 3: Cross multiply
    2,138.75x = 3,198.86 × 1,259.16
  4. Step 4: Simplify right side
    2,138.75x = 4,027,876.56
  5. Step 5: Solve for x
    x = 4,027,876.56/2,138.75
  6. Step 6: Final answer
    x = 1,883.29

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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.