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Finding the Fourth Proportional to 263,279.88, 394,960.80 and 85,745.58

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Solution

The fourth proportional to 263,279.88, 394,960.80 and 85,745.58 is: 128,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,279.88 : 394,960.80 = 85,745.58 : x
  2. Step 2: Convert to fraction form
    263,279.88/394,960.80 = 85,745.58/x
  3. Step 3: Cross multiply
    263,279.88x = 394,960.80 × 85,745.58
  4. Step 4: Simplify right side
    263,279.88x = 33,866,142,873.26
  5. Step 5: Solve for x
    x = 33,866,142,873.26/263,279.88
  6. Step 6: Final answer
    x = 128,631.72

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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.