Home / 2,986.20-4,120.96-1,660.03

Finding the Fourth Proportional to 2,986.20, 4,120.96 and 1,660.03

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Solution

The fourth proportional to 2,986.20, 4,120.96 and 1,660.03 is: 2,290.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.20 : 4,120.96 = 1,660.03 : x
  2. Step 2: Convert to fraction form
    2,986.20/4,120.96 = 1,660.03/x
  3. Step 3: Cross multiply
    2,986.20x = 4,120.96 × 1,660.03
  4. Step 4: Simplify right side
    2,986.20x = 6,840,917.23
  5. Step 5: Solve for x
    x = 6,840,917.23/2,986.20
  6. Step 6: Final answer
    x = 2,290.84

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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.