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Finding the Fourth Proportional to 636,786.87, 879,169.26 and 395,325.67

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Solution

The fourth proportional to 636,786.87, 879,169.26 and 395,325.67 is: 545,799.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,786.87 : 879,169.26 = 395,325.67 : x
  2. Step 2: Convert to fraction form
    636,786.87/879,169.26 = 395,325.67/x
  3. Step 3: Cross multiply
    636,786.87x = 879,169.26 × 395,325.67
  4. Step 4: Simplify right side
    636,786.87x = 347,558,179,334.34
  5. Step 5: Solve for x
    x = 347,558,179,334.34/636,786.87
  6. Step 6: Final answer
    x = 545,799.85

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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.