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Finding the Fourth Proportional to 639,887.92, 883,027.17 and 353,401.86

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Solution

The fourth proportional to 639,887.92, 883,027.17 and 353,401.86 is: 487,684.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,887.92 : 883,027.17 = 353,401.86 : x
  2. Step 2: Convert to fraction form
    639,887.92/883,027.17 = 353,401.86/x
  3. Step 3: Cross multiply
    639,887.92x = 883,027.17 × 353,401.86
  4. Step 4: Simplify right side
    639,887.92x = 312,063,444,308.54
  5. Step 5: Solve for x
    x = 312,063,444,308.54/639,887.92
  6. Step 6: Final answer
    x = 487,684.54

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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.