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Finding the Fourth Proportional to 494,721, 682,769.66 and 279,859.19

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Solution

The fourth proportional to 494,721, 682,769.66 and 279,859.19 is: 386,236.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,721 : 682,769.66 = 279,859.19 : x
  2. Step 2: Convert to fraction form
    494,721/682,769.66 = 279,859.19/x
  3. Step 3: Cross multiply
    494,721x = 682,769.66 × 279,859.19
  4. Step 4: Simplify right side
    494,721x = 191,079,359,191.03
  5. Step 5: Solve for x
    x = 191,079,359,191.03/494,721
  6. Step 6: Final answer
    x = 386,236.60

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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.