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Finding the Fourth Proportional to 677,647.76, 935,183.41 and 405,663.21

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Solution

The fourth proportional to 677,647.76, 935,183.41 and 405,663.21 is: 559,832.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,647.76 : 935,183.41 = 405,663.21 : x
  2. Step 2: Convert to fraction form
    677,647.76/935,183.41 = 405,663.21/x
  3. Step 3: Cross multiply
    677,647.76x = 935,183.41 × 405,663.21
  4. Step 4: Simplify right side
    677,647.76x = 379,369,507,366.78
  5. Step 5: Solve for x
    x = 379,369,507,366.78/677,647.76
  6. Step 6: Final answer
    x = 559,832.90

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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.