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Finding the Fourth Proportional to 2,279.87, 3,420.62 and 799.31

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Solution

The fourth proportional to 2,279.87, 3,420.62 and 799.31 is: 1,199.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.87 : 3,420.62 = 799.31 : x
  2. Step 2: Convert to fraction form
    2,279.87/3,420.62 = 799.31/x
  3. Step 3: Cross multiply
    2,279.87x = 3,420.62 × 799.31
  4. Step 4: Simplify right side
    2,279.87x = 2,734,135.77
  5. Step 5: Solve for x
    x = 2,734,135.77/2,279.87
  6. Step 6: Final answer
    x = 1,199.25

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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.