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Finding the Fourth Proportional to 681,769.86, 940,908.95 and 509,388.71

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Solution

The fourth proportional to 681,769.86, 940,908.95 and 509,388.71 is: 703,006.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,769.86 : 940,908.95 = 509,388.71 : x
  2. Step 2: Convert to fraction form
    681,769.86/940,908.95 = 509,388.71/x
  3. Step 3: Cross multiply
    681,769.86x = 940,908.95 × 509,388.71
  4. Step 4: Simplify right side
    681,769.86x = 479,288,389,016.47
  5. Step 5: Solve for x
    x = 479,288,389,016.47/681,769.86
  6. Step 6: Final answer
    x = 703,006.13

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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.