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Finding the Fourth Proportional to 2,808.87, 3,871.06 and 2,251.18

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Solution

The fourth proportional to 2,808.87, 3,871.06 and 2,251.18 is: 3,102.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.87 : 3,871.06 = 2,251.18 : x
  2. Step 2: Convert to fraction form
    2,808.87/3,871.06 = 2,251.18/x
  3. Step 3: Cross multiply
    2,808.87x = 3,871.06 × 2,251.18
  4. Step 4: Simplify right side
    2,808.87x = 8,714,452.85
  5. Step 5: Solve for x
    x = 8,714,452.85/2,808.87
  6. Step 6: Final answer
    x = 3,102.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.