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Finding the Fourth Proportional to 394,611.20, 591,993.60 and 169,971.20

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Solution

The fourth proportional to 394,611.20, 591,993.60 and 169,971.20 is: 254,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,611.20 : 591,993.60 = 169,971.20 : x
  2. Step 2: Convert to fraction form
    394,611.20/591,993.60 = 169,971.20/x
  3. Step 3: Cross multiply
    394,611.20x = 591,993.60 × 169,971.20
  4. Step 4: Simplify right side
    394,611.20x = 100,621,862,584.32
  5. Step 5: Solve for x
    x = 100,621,862,584.32/394,611.20
  6. Step 6: Final answer
    x = 254,989.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.