Home / 2,819.34-3,890.31-1,639.50

Finding the Fourth Proportional to 2,819.34, 3,890.31 and 1,639.50

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Solution

The fourth proportional to 2,819.34, 3,890.31 and 1,639.50 is: 2,262.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.34 : 3,890.31 = 1,639.50 : x
  2. Step 2: Convert to fraction form
    2,819.34/3,890.31 = 1,639.50/x
  3. Step 3: Cross multiply
    2,819.34x = 3,890.31 × 1,639.50
  4. Step 4: Simplify right side
    2,819.34x = 6,378,163.25
  5. Step 5: Solve for x
    x = 6,378,163.25/2,819.34
  6. Step 6: Final answer
    x = 2,262.29

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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.