Home / 2,819.30-3,890.30-1,640.58

Finding the Fourth Proportional to 2,819.30, 3,890.30 and 1,640.58

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Solution

The fourth proportional to 2,819.30, 3,890.30 and 1,640.58 is: 2,263.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.30 : 3,890.30 = 1,640.58 : x
  2. Step 2: Convert to fraction form
    2,819.30/3,890.30 = 1,640.58/x
  3. Step 3: Cross multiply
    2,819.30x = 3,890.30 × 1,640.58
  4. Step 4: Simplify right side
    2,819.30x = 6,382,348.37
  5. Step 5: Solve for x
    x = 6,382,348.37/2,819.30
  6. Step 6: Final answer
    x = 2,263.81

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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.