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Finding the Fourth Proportional to 644,648.40, 966,972.60 and 195,346.80

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Solution

The fourth proportional to 644,648.40, 966,972.60 and 195,346.80 is: 293,020.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,648.40 : 966,972.60 = 195,346.80 : x
  2. Step 2: Convert to fraction form
    644,648.40/966,972.60 = 195,346.80/x
  3. Step 3: Cross multiply
    644,648.40x = 966,972.60 × 195,346.80
  4. Step 4: Simplify right side
    644,648.40x = 188,895,003,097.68
  5. Step 5: Solve for x
    x = 188,895,003,097.68/644,648.40
  6. Step 6: Final answer
    x = 293,020.20

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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.