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Finding the Fourth Proportional to 394,611.02, 591,922 and 128,372.92

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Solution

The fourth proportional to 394,611.02, 591,922 and 128,372.92 is: 192,561.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,611.02 : 591,922 = 128,372.92 : x
  2. Step 2: Convert to fraction form
    394,611.02/591,922 = 128,372.92/x
  3. Step 3: Cross multiply
    394,611.02x = 591,922 × 128,372.92
  4. Step 4: Simplify right side
    394,611.02x = 75,986,755,552.24
  5. Step 5: Solve for x
    x = 75,986,755,552.24/394,611.02
  6. Step 6: Final answer
    x = 192,561.16

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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.