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Finding the Fourth Proportional to 609,118.20, 840,301.56 and 394,327.80

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Solution

The fourth proportional to 609,118.20, 840,301.56 and 394,327.80 is: 543,990.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,118.20 : 840,301.56 = 394,327.80 : x
  2. Step 2: Convert to fraction form
    609,118.20/840,301.56 = 394,327.80/x
  3. Step 3: Cross multiply
    609,118.20x = 840,301.56 × 394,327.80
  4. Step 4: Simplify right side
    609,118.20x = 331,354,265,491.37
  5. Step 5: Solve for x
    x = 331,354,265,491.37/609,118.20
  6. Step 6: Final answer
    x = 543,990.09

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Similar ratio
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1.5x scale

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.