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Finding the Fourth Proportional to 2,093.80, 3,141.30 and 861.49

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Solution

The fourth proportional to 2,093.80, 3,141.30 and 861.49 is: 1,292.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,093.80 : 3,141.30 = 861.49 : x
  2. Step 2: Convert to fraction form
    2,093.80/3,141.30 = 861.49/x
  3. Step 3: Cross multiply
    2,093.80x = 3,141.30 × 861.49
  4. Step 4: Simplify right side
    2,093.80x = 2,706,198.54
  5. Step 5: Solve for x
    x = 2,706,198.54/2,093.80
  6. Step 6: Final answer
    x = 1,292.48

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1.5x scale

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.