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Finding the Fourth Proportional to 515,356.53, 711,196.29 and 285,928.88

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Solution

The fourth proportional to 515,356.53, 711,196.29 and 285,928.88 is: 394,584.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,356.53 : 711,196.29 = 285,928.88 : x
  2. Step 2: Convert to fraction form
    515,356.53/711,196.29 = 285,928.88/x
  3. Step 3: Cross multiply
    515,356.53x = 711,196.29 × 285,928.88
  4. Step 4: Simplify right side
    515,356.53x = 203,351,555,103.87
  5. Step 5: Solve for x
    x = 203,351,555,103.87/515,356.53
  6. Step 6: Final answer
    x = 394,584.22

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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.