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Finding the Fourth Proportional to 489,469.04, 675,469.14 and 285,660.74

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Solution

The fourth proportional to 489,469.04, 675,469.14 and 285,660.74 is: 394,212.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,469.04 : 675,469.14 = 285,660.74 : x
  2. Step 2: Convert to fraction form
    489,469.04/675,469.14 = 285,660.74/x
  3. Step 3: Cross multiply
    489,469.04x = 675,469.14 × 285,660.74
  4. Step 4: Simplify right side
    489,469.04x = 192,955,014,379.56
  5. Step 5: Solve for x
    x = 192,955,014,379.56/489,469.04
  6. Step 6: Final answer
    x = 394,212.91

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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.