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Finding the Fourth Proportional to 263,270.16, 394,904.90 and 85,776.87

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Solution

The fourth proportional to 263,270.16, 394,904.90 and 85,776.87 is: 128,665.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,270.16 : 394,904.90 = 85,776.87 : x
  2. Step 2: Convert to fraction form
    263,270.16/394,904.90 = 85,776.87/x
  3. Step 3: Cross multiply
    263,270.16x = 394,904.90 × 85,776.87
  4. Step 4: Simplify right side
    263,270.16x = 33,873,705,840.78
  5. Step 5: Solve for x
    x = 33,873,705,840.78/263,270.16
  6. Step 6: Final answer
    x = 128,665.19

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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.