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Finding the Fourth Proportional to 489,502.70, 675,556.47 and 285,619.30

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Solution

The fourth proportional to 489,502.70, 675,556.47 and 285,619.30 is: 394,179.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,502.70 : 675,556.47 = 285,619.30 : x
  2. Step 2: Convert to fraction form
    489,502.70/675,556.47 = 285,619.30/x
  3. Step 3: Cross multiply
    489,502.70x = 675,556.47 × 285,619.30
  4. Step 4: Simplify right side
    489,502.70x = 192,951,963,311.91
  5. Step 5: Solve for x
    x = 192,951,963,311.91/489,502.70
  6. Step 6: Final answer
    x = 394,179.57

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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.