Home / 1,991.24-2,966.13-1,919.96

Finding the Fourth Proportional to 1,991.24, 2,966.13 and 1,919.96

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Solution

The fourth proportional to 1,991.24, 2,966.13 and 1,919.96 is: 2,859.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.24 : 2,966.13 = 1,919.96 : x
  2. Step 2: Convert to fraction form
    1,991.24/2,966.13 = 1,919.96/x
  3. Step 3: Cross multiply
    1,991.24x = 2,966.13 × 1,919.96
  4. Step 4: Simplify right side
    1,991.24x = 5,694,850.95
  5. Step 5: Solve for x
    x = 5,694,850.95/1,991.24
  6. Step 6: Final answer
    x = 2,859.95

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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.