Home / 2,819.49-3,891.81-1,640.34

Finding the Fourth Proportional to 2,819.49, 3,891.81 and 1,640.34

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Solution

The fourth proportional to 2,819.49, 3,891.81 and 1,640.34 is: 2,264.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.49 : 3,891.81 = 1,640.34 : x
  2. Step 2: Convert to fraction form
    2,819.49/3,891.81 = 1,640.34/x
  3. Step 3: Cross multiply
    2,819.49x = 3,891.81 × 1,640.34
  4. Step 4: Simplify right side
    2,819.49x = 6,383,891.62
  5. Step 5: Solve for x
    x = 6,383,891.62/2,819.49
  6. Step 6: Final answer
    x = 2,264.20

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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.