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Finding the Fourth Proportional to 665,105.80, 997,658.70 and 654,608.20

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Solution

The fourth proportional to 665,105.80, 997,658.70 and 654,608.20 is: 981,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,105.80 : 997,658.70 = 654,608.20 : x
  2. Step 2: Convert to fraction form
    665,105.80/997,658.70 = 654,608.20/x
  3. Step 3: Cross multiply
    665,105.80x = 997,658.70 × 654,608.20
  4. Step 4: Simplify right side
    665,105.80x = 653,075,565,821.34
  5. Step 5: Solve for x
    x = 653,075,565,821.34/665,105.80
  6. Step 6: Final answer
    x = 981,912.30

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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.