Home / 2,255.38-3,112.45-1,260.71

Finding the Fourth Proportional to 2,255.38, 3,112.45 and 1,260.71

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Solution

The fourth proportional to 2,255.38, 3,112.45 and 1,260.71 is: 1,739.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.38 : 3,112.45 = 1,260.71 : x
  2. Step 2: Convert to fraction form
    2,255.38/3,112.45 = 1,260.71/x
  3. Step 3: Cross multiply
    2,255.38x = 3,112.45 × 1,260.71
  4. Step 4: Simplify right side
    2,255.38x = 3,923,910.85
  5. Step 5: Solve for x
    x = 3,923,910.85/2,255.38
  6. Step 6: Final answer
    x = 1,739.80

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Half scale
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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.