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Finding the Fourth Proportional to 3,618.88, 5,397.89 and 3,286.68

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Solution

The fourth proportional to 3,618.88, 5,397.89 and 3,286.68 is: 4,902.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.88 : 5,397.89 = 3,286.68 : x
  2. Step 2: Convert to fraction form
    3,618.88/5,397.89 = 3,286.68/x
  3. Step 3: Cross multiply
    3,618.88x = 5,397.89 × 3,286.68
  4. Step 4: Simplify right side
    3,618.88x = 17,741,118.92
  5. Step 5: Solve for x
    x = 17,741,118.92/3,618.88
  6. Step 6: Final answer
    x = 4,902.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.