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Finding the Fourth Proportional to 515,324.11, 711,148.10 and 285,881.39

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Solution

The fourth proportional to 515,324.11, 711,148.10 and 285,881.39 is: 394,516.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,324.11 : 711,148.10 = 285,881.39 : x
  2. Step 2: Convert to fraction form
    515,324.11/711,148.10 = 285,881.39/x
  3. Step 3: Cross multiply
    515,324.11x = 711,148.10 × 285,881.39
  4. Step 4: Simplify right side
    515,324.11x = 203,304,007,323.86
  5. Step 5: Solve for x
    x = 203,304,007,323.86/515,324.11
  6. Step 6: Final answer
    x = 394,516.78

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Double scale
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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.