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Finding the Fourth Proportional to 515,635.16, 711,571.11 and 286,194.42

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Solution

The fourth proportional to 515,635.16, 711,571.11 and 286,194.42 is: 394,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,635.16 : 711,571.11 = 286,194.42 : x
  2. Step 2: Convert to fraction form
    515,635.16/711,571.11 = 286,194.42/x
  3. Step 3: Cross multiply
    515,635.16x = 711,571.11 × 286,194.42
  4. Step 4: Simplify right side
    515,635.16x = 203,647,681,115.21
  5. Step 5: Solve for x
    x = 203,647,681,115.21/515,635.16
  6. Step 6: Final answer
    x = 394,945.30

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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.