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Finding the Fourth Proportional to 674,906.78, 931,605.91 and 388,541.00

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Solution

The fourth proportional to 674,906.78, 931,605.91 and 388,541.00 is: 536,321.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,906.78 : 931,605.91 = 388,541.00 : x
  2. Step 2: Convert to fraction form
    674,906.78/931,605.91 = 388,541.00/x
  3. Step 3: Cross multiply
    674,906.78x = 931,605.91 × 388,541.00
  4. Step 4: Simplify right side
    674,906.78x = 361,967,093,234.97
  5. Step 5: Solve for x
    x = 361,967,093,234.97/674,906.78
  6. Step 6: Final answer
    x = 536,321.61

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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.