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Finding the Fourth Proportional to 681,399.91, 940,331.90 and 395,086.07

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Solution

The fourth proportional to 681,399.91, 940,331.90 and 395,086.07 is: 545,218.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,399.91 : 940,331.90 = 395,086.07 : x
  2. Step 2: Convert to fraction form
    681,399.91/940,331.90 = 395,086.07/x
  3. Step 3: Cross multiply
    681,399.91x = 940,331.90 × 395,086.07
  4. Step 4: Simplify right side
    681,399.91x = 371,512,034,866.63
  5. Step 5: Solve for x
    x = 371,512,034,866.63/681,399.91
  6. Step 6: Final answer
    x = 545,218.79

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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.