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Finding the Fourth Proportional to 681,642.85, 940,556.51 and 395,106.97

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Solution

The fourth proportional to 681,642.85, 940,556.51 and 395,106.97 is: 545,183.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,642.85 : 940,556.51 = 395,106.97 : x
  2. Step 2: Convert to fraction form
    681,642.85/940,556.51 = 395,106.97/x
  3. Step 3: Cross multiply
    681,642.85x = 940,556.51 × 395,106.97
  4. Step 4: Simplify right side
    681,642.85x = 371,620,430,804.34
  5. Step 5: Solve for x
    x = 371,620,430,804.34/681,642.85
  6. Step 6: Final answer
    x = 545,183.49

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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.