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Finding the Fourth Proportional to 263,149.14, 394,728.60 and 85,655.46

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Solution

The fourth proportional to 263,149.14, 394,728.60 and 85,655.46 is: 128,484.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,149.14 : 394,728.60 = 85,655.46 : x
  2. Step 2: Convert to fraction form
    263,149.14/394,728.60 = 85,655.46/x
  3. Step 3: Cross multiply
    263,149.14x = 394,728.60 × 85,655.46
  4. Step 4: Simplify right side
    263,149.14x = 33,810,659,808.16
  5. Step 5: Solve for x
    x = 33,810,659,808.16/263,149.14
  6. Step 6: Final answer
    x = 128,484.78

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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.