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Finding the Fourth Proportional to 3,618, 4,993.11 and 2,221.02

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Solution

The fourth proportional to 3,618, 4,993.11 and 2,221.02 is: 3,065.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618 : 4,993.11 = 2,221.02 : x
  2. Step 2: Convert to fraction form
    3,618/4,993.11 = 2,221.02/x
  3. Step 3: Cross multiply
    3,618x = 4,993.11 × 2,221.02
  4. Step 4: Simplify right side
    3,618x = 11,089,797.17
  5. Step 5: Solve for x
    x = 11,089,797.17/3,618
  6. Step 6: Final answer
    x = 3,065.17

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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.