Home / 2,819.59-3,890.66-1,639.75

Finding the Fourth Proportional to 2,819.59, 3,890.66 and 1,639.75

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Solution

The fourth proportional to 2,819.59, 3,890.66 and 1,639.75 is: 2,262.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.59 : 3,890.66 = 1,639.75 : x
  2. Step 2: Convert to fraction form
    2,819.59/3,890.66 = 1,639.75/x
  3. Step 3: Cross multiply
    2,819.59x = 3,890.66 × 1,639.75
  4. Step 4: Simplify right side
    2,819.59x = 6,379,701.54
  5. Step 5: Solve for x
    x = 6,379,701.54/2,819.59
  6. Step 6: Final answer
    x = 2,262.63

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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.