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Finding the Fourth Proportional to 445,206.63, 666,213.60 and 385,440.66

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Solution

The fourth proportional to 445,206.63, 666,213.60 and 385,440.66 is: 576,778.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,206.63 : 666,213.60 = 385,440.66 : x
  2. Step 2: Convert to fraction form
    445,206.63/666,213.60 = 385,440.66/x
  3. Step 3: Cross multiply
    445,206.63x = 666,213.60 × 385,440.66
  4. Step 4: Simplify right side
    445,206.63x = 256,785,809,684.98
  5. Step 5: Solve for x
    x = 256,785,809,684.98/445,206.63
  6. Step 6: Final answer
    x = 576,778.94

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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.