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Finding the Fourth Proportional to 609,469.80, 840,789.12 and 394,679.04

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Solution

The fourth proportional to 609,469.80, 840,789.12 and 394,679.04 is: 544,476.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,469.80 : 840,789.12 = 394,679.04 : x
  2. Step 2: Convert to fraction form
    609,469.80/840,789.12 = 394,679.04/x
  3. Step 3: Cross multiply
    609,469.80x = 840,789.12 × 394,679.04
  4. Step 4: Simplify right side
    609,469.80x = 331,841,842,724.05
  5. Step 5: Solve for x
    x = 331,841,842,724.05/609,469.80
  6. Step 6: Final answer
    x = 544,476.27

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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.