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Finding the Fourth Proportional to 669,604.61, 923,910.59 and 397,764.15

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Solution

The fourth proportional to 669,604.61, 923,910.59 and 397,764.15 is: 548,829.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,604.61 : 923,910.59 = 397,764.15 : x
  2. Step 2: Convert to fraction form
    669,604.61/923,910.59 = 397,764.15/x
  3. Step 3: Cross multiply
    669,604.61x = 923,910.59 × 397,764.15
  4. Step 4: Simplify right side
    669,604.61x = 367,498,508,518.53
  5. Step 5: Solve for x
    x = 367,498,508,518.53/669,604.61
  6. Step 6: Final answer
    x = 548,829.12

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Double scale
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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.