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Finding the Third Proportional to 854.50 and 1,879

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Solution

The third proportional to 854.50 and 1,879 is: 4,131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.50 : 1,879 = 1,879 : x
  2. Step 2: Convert to fraction form
    854.50/1,879 = 1,879/x
  3. Step 3: Cross multiply
    854.50x = 1,879 × 1,879
  4. Step 4: Simplify right side
    854.50x = 3,530,641
  5. Step 5: Solve for x
    x = 3,530,641/854.50
  6. Step 6: Final answer
    x = 4,131.82

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.