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Finding the Fourth Proportional to 625,809.05, 863,633.46 and 353,917.60

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Solution

The fourth proportional to 625,809.05, 863,633.46 and 353,917.60 is: 488,415.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,809.05 : 863,633.46 = 353,917.60 : x
  2. Step 2: Convert to fraction form
    625,809.05/863,633.46 = 353,917.60/x
  3. Step 3: Cross multiply
    625,809.05x = 863,633.46 × 353,917.60
  4. Step 4: Simplify right side
    625,809.05x = 305,655,077,124.73
  5. Step 5: Solve for x
    x = 305,655,077,124.73/625,809.05
  6. Step 6: Final answer
    x = 488,415.88

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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.