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Finding the Fourth Proportional to 263,245.06, 394,867.28 and 85,751.78

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Solution

The fourth proportional to 263,245.06, 394,867.28 and 85,751.78 is: 128,627.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,245.06 : 394,867.28 = 85,751.78 : x
  2. Step 2: Convert to fraction form
    263,245.06/394,867.28 = 85,751.78/x
  3. Step 3: Cross multiply
    263,245.06x = 394,867.28 × 85,751.78
  4. Step 4: Simplify right side
    263,245.06x = 33,860,571,695.00
  5. Step 5: Solve for x
    x = 33,860,571,695.00/263,245.06
  6. Step 6: Final answer
    x = 128,627.57

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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.