Home / 2,619.12-3,928.66-1,890.12

Finding the Fourth Proportional to 2,619.12, 3,928.66 and 1,890.12

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Solution

The fourth proportional to 2,619.12, 3,928.66 and 1,890.12 is: 2,835.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.12 : 3,928.66 = 1,890.12 : x
  2. Step 2: Convert to fraction form
    2,619.12/3,928.66 = 1,890.12/x
  3. Step 3: Cross multiply
    2,619.12x = 3,928.66 × 1,890.12
  4. Step 4: Simplify right side
    2,619.12x = 7,425,638.84
  5. Step 5: Solve for x
    x = 7,425,638.84/2,619.12
  6. Step 6: Final answer
    x = 2,835.17

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.