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Finding the Fourth Proportional to 394,945.60, 593,800.80 and 386,651.20

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Solution

The fourth proportional to 394,945.60, 593,800.80 and 386,651.20 is: 581,330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,945.60 : 593,800.80 = 386,651.20 : x
  2. Step 2: Convert to fraction form
    394,945.60/593,800.80 = 386,651.20/x
  3. Step 3: Cross multiply
    394,945.60x = 593,800.80 × 386,651.20
  4. Step 4: Simplify right side
    394,945.60x = 229,593,791,880.96
  5. Step 5: Solve for x
    x = 229,593,791,880.96/394,945.60
  6. Step 6: Final answer
    x = 581,330.17

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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.