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Finding the Fourth Proportional to 263,292.53, 394,979.76 and 85,758.21

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Solution

The fourth proportional to 263,292.53, 394,979.76 and 85,758.21 is: 128,650.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,292.53 : 394,979.76 = 85,758.21 : x
  2. Step 2: Convert to fraction form
    263,292.53/394,979.76 = 85,758.21/x
  3. Step 3: Cross multiply
    263,292.53x = 394,979.76 × 85,758.21
  4. Step 4: Simplify right side
    263,292.53x = 33,872,757,203.83
  5. Step 5: Solve for x
    x = 33,872,757,203.83/263,292.53
  6. Step 6: Final answer
    x = 128,650.66

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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.