Home / 2,201.89-3,284.49-1,991.70

Finding the Fourth Proportional to 2,201.89, 3,284.49 and 1,991.70

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Solution

The fourth proportional to 2,201.89, 3,284.49 and 1,991.70 is: 2,970.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,201.89 : 3,284.49 = 1,991.70 : x
  2. Step 2: Convert to fraction form
    2,201.89/3,284.49 = 1,991.70/x
  3. Step 3: Cross multiply
    2,201.89x = 3,284.49 × 1,991.70
  4. Step 4: Simplify right side
    2,201.89x = 6,541,711.36
  5. Step 5: Solve for x
    x = 6,541,711.36/2,201.89
  6. Step 6: Final answer
    x = 2,970.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.