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Finding the Fourth Proportional to 1,786.87, 2,680.95 and 799.60

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Solution

The fourth proportional to 1,786.87, 2,680.95 and 799.60 is: 1,199.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.87 : 2,680.95 = 799.60 : x
  2. Step 2: Convert to fraction form
    1,786.87/2,680.95 = 799.60/x
  3. Step 3: Cross multiply
    1,786.87x = 2,680.95 × 799.60
  4. Step 4: Simplify right side
    1,786.87x = 2,143,687.62
  5. Step 5: Solve for x
    x = 2,143,687.62/1,786.87
  6. Step 6: Final answer
    x = 1,199.69

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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.