Home / 1,991.43-2,986.33-1,439.01

Finding the Fourth Proportional to 1,991.43, 2,986.33 and 1,439.01

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Solution

The fourth proportional to 1,991.43, 2,986.33 and 1,439.01 is: 2,157.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.43 : 2,986.33 = 1,439.01 : x
  2. Step 2: Convert to fraction form
    1,991.43/2,986.33 = 1,439.01/x
  3. Step 3: Cross multiply
    1,991.43x = 2,986.33 × 1,439.01
  4. Step 4: Simplify right side
    1,991.43x = 4,297,355.14
  5. Step 5: Solve for x
    x = 4,297,355.14/1,991.43
  6. Step 6: Final answer
    x = 2,157.92

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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.