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Finding the Fourth Proportional to 694,985, 959,072.82 and 393,179

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Solution

The fourth proportional to 694,985, 959,072.82 and 393,179 is: 542,583.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,985 : 959,072.82 = 393,179 : x
  2. Step 2: Convert to fraction form
    694,985/959,072.82 = 393,179/x
  3. Step 3: Cross multiply
    694,985x = 959,072.82 × 393,179
  4. Step 4: Simplify right side
    694,985x = 377,087,292,294.78
  5. Step 5: Solve for x
    x = 377,087,292,294.78/694,985
  6. Step 6: Final answer
    x = 542,583.35

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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.