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Finding the Fourth Proportional to 394,079.60, 591,205.80 and 127,794.80

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Solution

The fourth proportional to 394,079.60, 591,205.80 and 127,794.80 is: 191,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,079.60 : 591,205.80 = 127,794.80 : x
  2. Step 2: Convert to fraction form
    394,079.60/591,205.80 = 127,794.80/x
  3. Step 3: Cross multiply
    394,079.60x = 591,205.80 × 127,794.80
  4. Step 4: Simplify right side
    394,079.60x = 75,553,026,969.84
  5. Step 5: Solve for x
    x = 75,553,026,969.84/394,079.60
  6. Step 6: Final answer
    x = 191,720.22

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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.