Home / 2,891.35-3,990.09-2,227.02

Finding the Fourth Proportional to 2,891.35, 3,990.09 and 2,227.02

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Solution

The fourth proportional to 2,891.35, 3,990.09 and 2,227.02 is: 3,073.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.35 : 3,990.09 = 2,227.02 : x
  2. Step 2: Convert to fraction form
    2,891.35/3,990.09 = 2,227.02/x
  3. Step 3: Cross multiply
    2,891.35x = 3,990.09 × 2,227.02
  4. Step 4: Simplify right side
    2,891.35x = 8,886,010.23
  5. Step 5: Solve for x
    x = 8,886,010.23/2,891.35
  6. Step 6: Final answer
    x = 3,073.31

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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.