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Finding the Fourth Proportional to 694,989, 959,078.34 and 393,183

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Solution

The fourth proportional to 694,989, 959,078.34 and 393,183 is: 542,588.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,989 : 959,078.34 = 393,183 : x
  2. Step 2: Convert to fraction form
    694,989/959,078.34 = 393,183/x
  3. Step 3: Cross multiply
    694,989x = 959,078.34 × 393,183
  4. Step 4: Simplify right side
    694,989x = 377,093,298,956.22
  5. Step 5: Solve for x
    x = 377,093,298,956.22/694,989
  6. Step 6: Final answer
    x = 542,588.87

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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.