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Finding the Fourth Proportional to 489,502.87, 675,556.71 and 285,619.48

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Solution

The fourth proportional to 489,502.87, 675,556.71 and 285,619.48 is: 394,179.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,502.87 : 675,556.71 = 285,619.48 : x
  2. Step 2: Convert to fraction form
    489,502.87/675,556.71 = 285,619.48/x
  3. Step 3: Cross multiply
    489,502.87x = 675,556.71 × 285,619.48
  4. Step 4: Simplify right side
    489,502.87x = 192,952,156,220.71
  5. Step 5: Solve for x
    x = 192,952,156,220.71/489,502.87
  6. Step 6: Final answer
    x = 394,179.83

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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.