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Finding the Fourth Proportional to 394,480.20, 591,720.30 and 157,992.60

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Solution

The fourth proportional to 394,480.20, 591,720.30 and 157,992.60 is: 236,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,480.20 : 591,720.30 = 157,992.60 : x
  2. Step 2: Convert to fraction form
    394,480.20/591,720.30 = 157,992.60/x
  3. Step 3: Cross multiply
    394,480.20x = 591,720.30 × 157,992.60
  4. Step 4: Simplify right side
    394,480.20x = 93,487,428,669.78
  5. Step 5: Solve for x
    x = 93,487,428,669.78/394,480.20
  6. Step 6: Final answer
    x = 236,988.90

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Similar ratio
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1.5x scale

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.