Home / 2,819.32-3,890.34-1,640.14

Finding the Fourth Proportional to 2,819.32, 3,890.34 and 1,640.14

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Solution

The fourth proportional to 2,819.32, 3,890.34 and 1,640.14 is: 2,263.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.32 : 3,890.34 = 1,640.14 : x
  2. Step 2: Convert to fraction form
    2,819.32/3,890.34 = 1,640.14/x
  3. Step 3: Cross multiply
    2,819.32x = 3,890.34 × 1,640.14
  4. Step 4: Simplify right side
    2,819.32x = 6,380,702.25
  5. Step 5: Solve for x
    x = 6,380,702.25/2,819.32
  6. Step 6: Final answer
    x = 2,263.21

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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.