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Finding the Fourth Proportional to 2,812.69, 3,879.99 and 1,692.96

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Solution

The fourth proportional to 2,812.69, 3,879.99 and 1,692.96 is: 2,335.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.69 : 3,879.99 = 1,692.96 : x
  2. Step 2: Convert to fraction form
    2,812.69/3,879.99 = 1,692.96/x
  3. Step 3: Cross multiply
    2,812.69x = 3,879.99 × 1,692.96
  4. Step 4: Simplify right side
    2,812.69x = 6,568,667.87
  5. Step 5: Solve for x
    x = 6,568,667.87/2,812.69
  6. Step 6: Final answer
    x = 2,335.37

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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.