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Finding the Fourth Proportional to 694,981, 959,067.30 and 393,175

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Solution

The fourth proportional to 694,981, 959,067.30 and 393,175 is: 542,577.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,981 : 959,067.30 = 393,175 : x
  2. Step 2: Convert to fraction form
    694,981/959,067.30 = 393,175/x
  3. Step 3: Cross multiply
    694,981x = 959,067.30 × 393,175
  4. Step 4: Simplify right side
    694,981x = 377,081,285,677.50
  5. Step 5: Solve for x
    x = 377,081,285,677.50/694,981
  6. Step 6: Final answer
    x = 542,577.83

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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.