Home / 3,112.40-4,290.36-2,694.80

Finding the Fourth Proportional to 3,112.40, 4,290.36 and 2,694.80

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Solution

The fourth proportional to 3,112.40, 4,290.36 and 2,694.80 is: 3,714.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.40 : 4,290.36 = 2,694.80 : x
  2. Step 2: Convert to fraction form
    3,112.40/4,290.36 = 2,694.80/x
  3. Step 3: Cross multiply
    3,112.40x = 4,290.36 × 2,694.80
  4. Step 4: Simplify right side
    3,112.40x = 11,561,662.13
  5. Step 5: Solve for x
    x = 11,561,662.13/3,112.40
  6. Step 6: Final answer
    x = 3,714.71

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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.