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Finding the Fourth Proportional to 863.14, 1,293.54 and 619.12

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Solution

The fourth proportional to 863.14, 1,293.54 and 619.12 is: 927.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.14 : 1,293.54 = 619.12 : x
  2. Step 2: Convert to fraction form
    863.14/1,293.54 = 619.12/x
  3. Step 3: Cross multiply
    863.14x = 1,293.54 × 619.12
  4. Step 4: Simplify right side
    863.14x = 800,856.48
  5. Step 5: Solve for x
    x = 800,856.48/863.14
  6. Step 6: Final answer
    x = 927.84

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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.