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Finding the Fourth Proportional to 1,992.06, 2,986.93 and 759.55

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Solution

The fourth proportional to 1,992.06, 2,986.93 and 759.55 is: 1,138.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.06 : 2,986.93 = 759.55 : x
  2. Step 2: Convert to fraction form
    1,992.06/2,986.93 = 759.55/x
  3. Step 3: Cross multiply
    1,992.06x = 2,986.93 × 759.55
  4. Step 4: Simplify right side
    1,992.06x = 2,268,722.68
  5. Step 5: Solve for x
    x = 2,268,722.68/1,992.06
  6. Step 6: Final answer
    x = 1,138.88

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1.5x scale

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.