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Finding the Fourth Proportional to 494,721.98, 682,716.54 and 279,857.48

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Solution

The fourth proportional to 494,721.98, 682,716.54 and 279,857.48 is: 386,203.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,721.98 : 682,716.54 = 279,857.48 : x
  2. Step 2: Convert to fraction form
    494,721.98/682,716.54 = 279,857.48/x
  3. Step 3: Cross multiply
    494,721.98x = 682,716.54 × 279,857.48
  4. Step 4: Simplify right side
    494,721.98x = 191,063,330,438.72
  5. Step 5: Solve for x
    x = 191,063,330,438.72/494,721.98
  6. Step 6: Final answer
    x = 386,203.44

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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.