Home / 1,986.80-2,979.05-1,163.34

Finding the Fourth Proportional to 1,986.80, 2,979.05 and 1,163.34

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Solution

The fourth proportional to 1,986.80, 2,979.05 and 1,163.34 is: 1,744.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.80 : 2,979.05 = 1,163.34 : x
  2. Step 2: Convert to fraction form
    1,986.80/2,979.05 = 1,163.34/x
  3. Step 3: Cross multiply
    1,986.80x = 2,979.05 × 1,163.34
  4. Step 4: Simplify right side
    1,986.80x = 3,465,642.21
  5. Step 5: Solve for x
    x = 3,465,642.21/1,986.80
  6. Step 6: Final answer
    x = 1,744.34

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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.