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Finding the Fourth Proportional to 489,623.88, 675,685.62 and 285,801.96

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Solution

The fourth proportional to 489,623.88, 675,685.62 and 285,801.96 is: 394,409.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,623.88 : 675,685.62 = 285,801.96 : x
  2. Step 2: Convert to fraction form
    489,623.88/675,685.62 = 285,801.96/x
  3. Step 3: Cross multiply
    489,623.88x = 675,685.62 × 285,801.96
  4. Step 4: Simplify right side
    489,623.88x = 193,112,274,539.82
  5. Step 5: Solve for x
    x = 193,112,274,539.82/489,623.88
  6. Step 6: Final answer
    x = 394,409.43

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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.