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Finding the Fourth Proportional to 263,245.74, 394,868.31 and 85,752.47

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Solution

The fourth proportional to 263,245.74, 394,868.31 and 85,752.47 is: 128,628.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,245.74 : 394,868.31 = 85,752.47 : x
  2. Step 2: Convert to fraction form
    263,245.74/394,868.31 = 85,752.47/x
  3. Step 3: Cross multiply
    263,245.74x = 394,868.31 × 85,752.47
  4. Step 4: Simplify right side
    263,245.74x = 33,860,932,907.23
  5. Step 5: Solve for x
    x = 33,860,932,907.23/263,245.74
  6. Step 6: Final answer
    x = 128,628.61

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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.