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Finding the Fourth Proportional to 354,520.27, 489,239.51 and 193,378.78

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Solution

The fourth proportional to 354,520.27, 489,239.51 and 193,378.78 is: 266,863.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,520.27 : 489,239.51 = 193,378.78 : x
  2. Step 2: Convert to fraction form
    354,520.27/489,239.51 = 193,378.78/x
  3. Step 3: Cross multiply
    354,520.27x = 489,239.51 × 193,378.78
  4. Step 4: Simplify right side
    354,520.27x = 94,608,539,571.60
  5. Step 5: Solve for x
    x = 94,608,539,571.60/354,520.27
  6. Step 6: Final answer
    x = 266,863.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.