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Finding the Fourth Proportional to 2,748.15, 4,121.79 and 799.92

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Solution

The fourth proportional to 2,748.15, 4,121.79 and 799.92 is: 1,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,748.15 : 4,121.79 = 799.92 : x
  2. Step 2: Convert to fraction form
    2,748.15/4,121.79 = 799.92/x
  3. Step 3: Cross multiply
    2,748.15x = 4,121.79 × 799.92
  4. Step 4: Simplify right side
    2,748.15x = 3,297,102.26
  5. Step 5: Solve for x
    x = 3,297,102.26/2,748.15
  6. Step 6: Final answer
    x = 1,199.75

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1.5x scale

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.