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Finding the Fourth Proportional to 262,688.57, 394,088.24 and 85,181.78

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Solution

The fourth proportional to 262,688.57, 394,088.24 and 85,181.78 is: 127,790.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,688.57 : 394,088.24 = 85,181.78 : x
  2. Step 2: Convert to fraction form
    262,688.57/394,088.24 = 85,181.78/x
  3. Step 3: Cross multiply
    262,688.57x = 394,088.24 × 85,181.78
  4. Step 4: Simplify right side
    262,688.57x = 33,569,136,262.55
  5. Step 5: Solve for x
    x = 33,569,136,262.55/262,688.57
  6. Step 6: Final answer
    x = 127,790.62

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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.