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Finding the Fourth Proportional to 515,517.92, 711,727.69 and 400,579.45

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Solution

The fourth proportional to 515,517.92, 711,727.69 and 400,579.45 is: 553,042.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,517.92 : 711,727.69 = 400,579.45 : x
  2. Step 2: Convert to fraction form
    515,517.92/711,727.69 = 400,579.45/x
  3. Step 3: Cross multiply
    515,517.92x = 711,727.69 × 400,579.45
  4. Step 4: Simplify right side
    515,517.92x = 285,103,485,608.52
  5. Step 5: Solve for x
    x = 285,103,485,608.52/515,517.92
  6. Step 6: Final answer
    x = 553,042.82

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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.