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Finding the Fourth Proportional to 2,486.37, 3,727.98 and 819.90

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Solution

The fourth proportional to 2,486.37, 3,727.98 and 819.90 is: 1,229.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.37 : 3,727.98 = 819.90 : x
  2. Step 2: Convert to fraction form
    2,486.37/3,727.98 = 819.90/x
  3. Step 3: Cross multiply
    2,486.37x = 3,727.98 × 819.90
  4. Step 4: Simplify right side
    2,486.37x = 3,056,570.80
  5. Step 5: Solve for x
    x = 3,056,570.80/2,486.37
  6. Step 6: Final answer
    x = 1,229.33

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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.