Home / 2,921.97-4,382.83-1,990.87

Finding the Fourth Proportional to 2,921.97, 4,382.83 and 1,990.87

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Solution

The fourth proportional to 2,921.97, 4,382.83 and 1,990.87 is: 2,986.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.97 : 4,382.83 = 1,990.87 : x
  2. Step 2: Convert to fraction form
    2,921.97/4,382.83 = 1,990.87/x
  3. Step 3: Cross multiply
    2,921.97x = 4,382.83 × 1,990.87
  4. Step 4: Simplify right side
    2,921.97x = 8,725,644.76
  5. Step 5: Solve for x
    x = 8,725,644.76/2,921.97
  6. Step 6: Final answer
    x = 2,986.22

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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.