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Finding the Fourth Proportional to 669,213.44, 923,109.12 and 397,102.40

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Solution

The fourth proportional to 669,213.44, 923,109.12 and 397,102.40 is: 547,760.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,213.44 : 923,109.12 = 397,102.40 : x
  2. Step 2: Convert to fraction form
    669,213.44/923,109.12 = 397,102.40/x
  3. Step 3: Cross multiply
    669,213.44x = 923,109.12 × 397,102.40
  4. Step 4: Simplify right side
    669,213.44x = 366,568,847,013.89
  5. Step 5: Solve for x
    x = 366,568,847,013.89/669,213.44
  6. Step 6: Final answer
    x = 547,760.74

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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.