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Finding the Fourth Proportional to 681,399.47, 940,331.30 and 395,085.63

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Solution

The fourth proportional to 681,399.47, 940,331.30 and 395,085.63 is: 545,218.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,399.47 : 940,331.30 = 395,085.63 : x
  2. Step 2: Convert to fraction form
    681,399.47/940,331.30 = 395,085.63/x
  3. Step 3: Cross multiply
    681,399.47x = 940,331.30 × 395,085.63
  4. Step 4: Simplify right side
    681,399.47x = 371,511,385,620.03
  5. Step 5: Solve for x
    x = 371,511,385,620.03/681,399.47
  6. Step 6: Final answer
    x = 545,218.19

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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.