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Finding the Fourth Proportional to 636,499.15, 878,783.48 and 395,136.36

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Solution

The fourth proportional to 636,499.15, 878,783.48 and 395,136.36 is: 545,545.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,499.15 : 878,783.48 = 395,136.36 : x
  2. Step 2: Convert to fraction form
    636,499.15/878,783.48 = 395,136.36/x
  3. Step 3: Cross multiply
    636,499.15x = 878,783.48 × 395,136.36
  4. Step 4: Simplify right side
    636,499.15x = 347,239,305,021.41
  5. Step 5: Solve for x
    x = 347,239,305,021.41/636,499.15
  6. Step 6: Final answer
    x = 545,545.59

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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.