Home / 1,919.62-2,640.25-1,581.14

Finding the Fourth Proportional to 1,919.62, 2,640.25 and 1,581.14

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Solution

The fourth proportional to 1,919.62, 2,640.25 and 1,581.14 is: 2,174.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.62 : 2,640.25 = 1,581.14 : x
  2. Step 2: Convert to fraction form
    1,919.62/2,640.25 = 1,581.14/x
  3. Step 3: Cross multiply
    1,919.62x = 2,640.25 × 1,581.14
  4. Step 4: Simplify right side
    1,919.62x = 4,174,604.89
  5. Step 5: Solve for x
    x = 4,174,604.89/1,919.62
  6. Step 6: Final answer
    x = 2,174.70

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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.