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Finding the Fourth Proportional to 263,314.68, 394,896.60 and 85,837.20

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Solution

The fourth proportional to 263,314.68, 394,896.60 and 85,837.20 is: 128,731.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,314.68 : 394,896.60 = 85,837.20 : x
  2. Step 2: Convert to fraction form
    263,314.68/394,896.60 = 85,837.20/x
  3. Step 3: Cross multiply
    263,314.68x = 394,896.60 × 85,837.20
  4. Step 4: Simplify right side
    263,314.68x = 33,896,818,433.52
  5. Step 5: Solve for x
    x = 33,896,818,433.52/263,314.68
  6. Step 6: Final answer
    x = 128,731.21

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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.