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Finding the Fourth Proportional to 681,642.98, 940,556.68 and 395,107.10

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Solution

The fourth proportional to 681,642.98, 940,556.68 and 395,107.10 is: 545,183.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,642.98 : 940,556.68 = 395,107.10 : x
  2. Step 2: Convert to fraction form
    681,642.98/940,556.68 = 395,107.10/x
  3. Step 3: Cross multiply
    681,642.98x = 940,556.68 × 395,107.10
  4. Step 4: Simplify right side
    681,642.98x = 371,620,616,529.88
  5. Step 5: Solve for x
    x = 371,620,616,529.88/681,642.98
  6. Step 6: Final answer
    x = 545,183.67

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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.