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Finding the Fourth Proportional to 3,825.50, 5,279.19 and 2,169.50

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Solution

The fourth proportional to 3,825.50, 5,279.19 and 2,169.50 is: 2,993.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,825.50 : 5,279.19 = 2,169.50 : x
  2. Step 2: Convert to fraction form
    3,825.50/5,279.19 = 2,169.50/x
  3. Step 3: Cross multiply
    3,825.50x = 5,279.19 × 2,169.50
  4. Step 4: Simplify right side
    3,825.50x = 11,453,202.71
  5. Step 5: Solve for x
    x = 11,453,202.71/3,825.50
  6. Step 6: Final answer
    x = 2,993.91

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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.