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Finding the Fourth Proportional to 2,324.39, 3,486.78 and 763.92

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Solution

The fourth proportional to 2,324.39, 3,486.78 and 763.92 is: 1,145.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,324.39 : 3,486.78 = 763.92 : x
  2. Step 2: Convert to fraction form
    2,324.39/3,486.78 = 763.92/x
  3. Step 3: Cross multiply
    2,324.39x = 3,486.78 × 763.92
  4. Step 4: Simplify right side
    2,324.39x = 2,663,620.98
  5. Step 5: Solve for x
    x = 2,663,620.98/2,324.39
  6. Step 6: Final answer
    x = 1,145.95

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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.