Home / 2,986.36-4,120.44-1,791.55

Finding the Fourth Proportional to 2,986.36, 4,120.44 and 1,791.55

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Solution

The fourth proportional to 2,986.36, 4,120.44 and 1,791.55 is: 2,471.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.36 : 4,120.44 = 1,791.55 : x
  2. Step 2: Convert to fraction form
    2,986.36/4,120.44 = 1,791.55/x
  3. Step 3: Cross multiply
    2,986.36x = 4,120.44 × 1,791.55
  4. Step 4: Simplify right side
    2,986.36x = 7,381,974.28
  5. Step 5: Solve for x
    x = 7,381,974.28/2,986.36
  6. Step 6: Final answer
    x = 2,471.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.