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Finding the Fourth Proportional to 2,722.12, 4,081.32 and 990.52

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Solution

The fourth proportional to 2,722.12, 4,081.32 and 990.52 is: 1,485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,722.12 : 4,081.32 = 990.52 : x
  2. Step 2: Convert to fraction form
    2,722.12/4,081.32 = 990.52/x
  3. Step 3: Cross multiply
    2,722.12x = 4,081.32 × 990.52
  4. Step 4: Simplify right side
    2,722.12x = 4,042,629.09
  5. Step 5: Solve for x
    x = 4,042,629.09/2,722.12
  6. Step 6: Final answer
    x = 1,485.10

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.