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Finding the Fourth Proportional to 717,195.87, 989,752.08 and 394,917.50

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Solution

The fourth proportional to 717,195.87, 989,752.08 and 394,917.50 is: 544,998.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,195.87 : 989,752.08 = 394,917.50 : x
  2. Step 2: Convert to fraction form
    717,195.87/989,752.08 = 394,917.50/x
  3. Step 3: Cross multiply
    717,195.87x = 989,752.08 × 394,917.50
  4. Step 4: Simplify right side
    717,195.87x = 390,870,412,104.64
  5. Step 5: Solve for x
    x = 390,870,412,104.64/717,195.87
  6. Step 6: Final answer
    x = 544,998.14

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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.