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Finding the Fourth Proportional to 445,205.88, 666,212.49 and 385,439.91

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Solution

The fourth proportional to 445,205.88, 666,212.49 and 385,439.91 is: 576,777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,205.88 : 666,212.49 = 385,439.91 : x
  2. Step 2: Convert to fraction form
    445,205.88/666,212.49 = 385,439.91/x
  3. Step 3: Cross multiply
    445,205.88x = 666,212.49 × 385,439.91
  4. Step 4: Simplify right side
    445,205.88x = 256,784,882,186.48
  5. Step 5: Solve for x
    x = 256,784,882,186.48/445,205.88
  6. Step 6: Final answer
    x = 576,777.83

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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.