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Finding the Fourth Proportional to 681,528.33, 940,528.17 and 391,164.93

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Solution

The fourth proportional to 681,528.33, 940,528.17 and 391,164.93 is: 539,818.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,528.33 : 940,528.17 = 391,164.93 : x
  2. Step 2: Convert to fraction form
    681,528.33/940,528.17 = 391,164.93/x
  3. Step 3: Cross multiply
    681,528.33x = 940,528.17 × 391,164.93
  4. Step 4: Simplify right side
    681,528.33x = 367,901,635,781.08
  5. Step 5: Solve for x
    x = 367,901,635,781.08/681,528.33
  6. Step 6: Final answer
    x = 539,818.55

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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.