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Finding the Fourth Proportional to 2,879.50, 3,974.19 and 2,179.66

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Solution

The fourth proportional to 2,879.50, 3,974.19 and 2,179.66 is: 3,008.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.50 : 3,974.19 = 2,179.66 : x
  2. Step 2: Convert to fraction form
    2,879.50/3,974.19 = 2,179.66/x
  3. Step 3: Cross multiply
    2,879.50x = 3,974.19 × 2,179.66
  4. Step 4: Simplify right side
    2,879.50x = 8,662,382.98
  5. Step 5: Solve for x
    x = 8,662,382.98/2,879.50
  6. Step 6: Final answer
    x = 3,008.29

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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.