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Finding the Fourth Proportional to 489,631.38, 675,695.97 and 285,809.46

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Solution

The fourth proportional to 489,631.38, 675,695.97 and 285,809.46 is: 394,419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,631.38 : 675,695.97 = 285,809.46 : x
  2. Step 2: Convert to fraction form
    489,631.38/675,695.97 = 285,809.46/x
  3. Step 3: Cross multiply
    489,631.38x = 675,695.97 × 285,809.46
  4. Step 4: Simplify right side
    489,631.38x = 193,120,300,309.88
  5. Step 5: Solve for x
    x = 193,120,300,309.88/489,631.38
  6. Step 6: Final answer
    x = 394,419.78

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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.