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Finding the Fourth Proportional to 694,991, 959,081.10 and 393,185

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Solution

The fourth proportional to 694,991, 959,081.10 and 393,185 is: 542,591.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,991 : 959,081.10 = 393,185 : x
  2. Step 2: Convert to fraction form
    694,991/959,081.10 = 393,185/x
  3. Step 3: Cross multiply
    694,991x = 959,081.10 × 393,185
  4. Step 4: Simplify right side
    694,991x = 377,096,302,303.50
  5. Step 5: Solve for x
    x = 377,096,302,303.50/694,991
  6. Step 6: Final answer
    x = 542,591.63

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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.