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Finding the Fourth Proportional to 2,990.36, 4,485.88 and 799.18

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Solution

The fourth proportional to 2,990.36, 4,485.88 and 799.18 is: 1,198.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.36 : 4,485.88 = 799.18 : x
  2. Step 2: Convert to fraction form
    2,990.36/4,485.88 = 799.18/x
  3. Step 3: Cross multiply
    2,990.36x = 4,485.88 × 799.18
  4. Step 4: Simplify right side
    2,990.36x = 3,585,025.58
  5. Step 5: Solve for x
    x = 3,585,025.58/2,990.36
  6. Step 6: Final answer
    x = 1,198.86

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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.