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Finding the Fourth Proportional to 2,886.28, 3,982.18 and 1,766.05

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Solution

The fourth proportional to 2,886.28, 3,982.18 and 1,766.05 is: 2,436.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.28 : 3,982.18 = 1,766.05 : x
  2. Step 2: Convert to fraction form
    2,886.28/3,982.18 = 1,766.05/x
  3. Step 3: Cross multiply
    2,886.28x = 3,982.18 × 1,766.05
  4. Step 4: Simplify right side
    2,886.28x = 7,032,728.99
  5. Step 5: Solve for x
    x = 7,032,728.99/2,886.28
  6. Step 6: Final answer
    x = 2,436.61

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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.