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Finding the Fourth Proportional to 2,855.39, 3,942.24 and 2,190.97

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Solution

The fourth proportional to 2,855.39, 3,942.24 and 2,190.97 is: 3,024.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.39 : 3,942.24 = 2,190.97 : x
  2. Step 2: Convert to fraction form
    2,855.39/3,942.24 = 2,190.97/x
  3. Step 3: Cross multiply
    2,855.39x = 3,942.24 × 2,190.97
  4. Step 4: Simplify right side
    2,855.39x = 8,637,329.57
  5. Step 5: Solve for x
    x = 8,637,329.57/2,855.39
  6. Step 6: Final answer
    x = 3,024.92

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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.