Home / 3,211.26-4,429.70-2,015.78

Finding the Fourth Proportional to 3,211.26, 4,429.70 and 2,015.78

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Solution

The fourth proportional to 3,211.26, 4,429.70 and 2,015.78 is: 2,780.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.26 : 4,429.70 = 2,015.78 : x
  2. Step 2: Convert to fraction form
    3,211.26/4,429.70 = 2,015.78/x
  3. Step 3: Cross multiply
    3,211.26x = 4,429.70 × 2,015.78
  4. Step 4: Simplify right side
    3,211.26x = 8,929,276.00
  5. Step 5: Solve for x
    x = 8,929,276.00/3,211.26
  6. Step 6: Final answer
    x = 2,780.62

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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.