Home / 2,819.15-3,890.64-1,640.13

Finding the Fourth Proportional to 2,819.15, 3,890.64 and 1,640.13

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Solution

The fourth proportional to 2,819.15, 3,890.64 and 1,640.13 is: 2,263.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.15 : 3,890.64 = 1,640.13 : x
  2. Step 2: Convert to fraction form
    2,819.15/3,890.64 = 1,640.13/x
  3. Step 3: Cross multiply
    2,819.15x = 3,890.64 × 1,640.13
  4. Step 4: Simplify right side
    2,819.15x = 6,381,155.38
  5. Step 5: Solve for x
    x = 6,381,155.38/2,819.15
  6. Step 6: Final answer
    x = 2,263.50

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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.