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Finding the Fourth Proportional to 3,618.97, 4,991.91 and 2,778.39

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Solution

The fourth proportional to 3,618.97, 4,991.91 and 2,778.39 is: 3,832.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.97 : 4,991.91 = 2,778.39 : x
  2. Step 2: Convert to fraction form
    3,618.97/4,991.91 = 2,778.39/x
  3. Step 3: Cross multiply
    3,618.97x = 4,991.91 × 2,778.39
  4. Step 4: Simplify right side
    3,618.97x = 13,869,481.13
  5. Step 5: Solve for x
    x = 13,869,481.13/3,618.97
  6. Step 6: Final answer
    x = 3,832.44

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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.