Home / 2,081.70-3,122.55-1,259.55

Finding the Fourth Proportional to 2,081.70, 3,122.55 and 1,259.55

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Solution

The fourth proportional to 2,081.70, 3,122.55 and 1,259.55 is: 1,889.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.70 : 3,122.55 = 1,259.55 : x
  2. Step 2: Convert to fraction form
    2,081.70/3,122.55 = 1,259.55/x
  3. Step 3: Cross multiply
    2,081.70x = 3,122.55 × 1,259.55
  4. Step 4: Simplify right side
    2,081.70x = 3,933,007.85
  5. Step 5: Solve for x
    x = 3,933,007.85/2,081.70
  6. Step 6: Final answer
    x = 1,889.33

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Half scale
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Double scale
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Similar ratio
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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.