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Finding the Fourth Proportional to 644,611.70, 966,917.55 and 639,946.10

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Solution

The fourth proportional to 644,611.70, 966,917.55 and 639,946.10 is: 959,919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,611.70 : 966,917.55 = 639,946.10 : x
  2. Step 2: Convert to fraction form
    644,611.70/966,917.55 = 639,946.10/x
  3. Step 3: Cross multiply
    644,611.70x = 966,917.55 × 639,946.10
  4. Step 4: Simplify right side
    644,611.70x = 618,775,115,144.06
  5. Step 5: Solve for x
    x = 618,775,115,144.06/644,611.70
  6. Step 6: Final answer
    x = 959,919.15

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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.