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Finding the Fourth Proportional to 665,117.80, 997,676.70 and 654,620.20

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Solution

The fourth proportional to 665,117.80, 997,676.70 and 654,620.20 is: 981,930.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,117.80 : 997,676.70 = 654,620.20 : x
  2. Step 2: Convert to fraction form
    665,117.80/997,676.70 = 654,620.20/x
  3. Step 3: Cross multiply
    665,117.80x = 997,676.70 × 654,620.20
  4. Step 4: Simplify right side
    665,117.80x = 653,099,320,889.34
  5. Step 5: Solve for x
    x = 653,099,320,889.34/665,117.80
  6. Step 6: Final answer
    x = 981,930.30

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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.