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Finding the Fourth Proportional to 2,990.26, 4,485.65 and 799

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Solution

The fourth proportional to 2,990.26, 4,485.65 and 799 is: 1,198.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.26 : 4,485.65 = 799 : x
  2. Step 2: Convert to fraction form
    2,990.26/4,485.65 = 799/x
  3. Step 3: Cross multiply
    2,990.26x = 4,485.65 × 799
  4. Step 4: Simplify right side
    2,990.26x = 3,584,034.35
  5. Step 5: Solve for x
    x = 3,584,034.35/2,990.26
  6. Step 6: Final answer
    x = 1,198.57

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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.