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Finding the Fourth Proportional to 263,072.60, 394,608.90 and 115,328.60

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Solution

The fourth proportional to 263,072.60, 394,608.90 and 115,328.60 is: 172,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,072.60 : 394,608.90 = 115,328.60 : x
  2. Step 2: Convert to fraction form
    263,072.60/394,608.90 = 115,328.60/x
  3. Step 3: Cross multiply
    263,072.60x = 394,608.90 × 115,328.60
  4. Step 4: Simplify right side
    263,072.60x = 45,509,691,984.54
  5. Step 5: Solve for x
    x = 45,509,691,984.54/263,072.60
  6. Step 6: Final answer
    x = 172,992.90

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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.