Home / 2,819.27-3,890.90-1,640.99

Finding the Fourth Proportional to 2,819.27, 3,890.90 and 1,640.99

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Solution

The fourth proportional to 2,819.27, 3,890.90 and 1,640.99 is: 2,264.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.27 : 3,890.90 = 1,640.99 : x
  2. Step 2: Convert to fraction form
    2,819.27/3,890.90 = 1,640.99/x
  3. Step 3: Cross multiply
    2,819.27x = 3,890.90 × 1,640.99
  4. Step 4: Simplify right side
    2,819.27x = 6,384,927.99
  5. Step 5: Solve for x
    x = 6,384,927.99/2,819.27
  6. Step 6: Final answer
    x = 2,264.75

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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.