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Finding the Fourth Proportional to 664,615.90, 996,923.85 and 620,001.10

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Solution

The fourth proportional to 664,615.90, 996,923.85 and 620,001.10 is: 930,001.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,615.90 : 996,923.85 = 620,001.10 : x
  2. Step 2: Convert to fraction form
    664,615.90/996,923.85 = 620,001.10/x
  3. Step 3: Cross multiply
    664,615.90x = 996,923.85 × 620,001.10
  4. Step 4: Simplify right side
    664,615.90x = 618,093,883,616.24
  5. Step 5: Solve for x
    x = 618,093,883,616.24/664,615.90
  6. Step 6: Final answer
    x = 930,001.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.