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Finding the Fourth Proportional to 263,209.88, 394,847.62 and 85,669.22

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Solution

The fourth proportional to 263,209.88, 394,847.62 and 85,669.22 is: 128,514.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,209.88 : 394,847.62 = 85,669.22 : x
  2. Step 2: Convert to fraction form
    263,209.88/394,847.62 = 85,669.22/x
  3. Step 3: Cross multiply
    263,209.88x = 394,847.62 × 85,669.22
  4. Step 4: Simplify right side
    263,209.88x = 33,826,287,624.26
  5. Step 5: Solve for x
    x = 33,826,287,624.26/263,209.88
  6. Step 6: Final answer
    x = 128,514.51

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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.