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Finding the Fourth Proportional to 645,906.20, 967,109.70 and 505,938.20

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Solution

The fourth proportional to 645,906.20, 967,109.70 and 505,938.20 is: 757,536.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,906.20 : 967,109.70 = 505,938.20 : x
  2. Step 2: Convert to fraction form
    645,906.20/967,109.70 = 505,938.20/x
  3. Step 3: Cross multiply
    645,906.20x = 967,109.70 × 505,938.20
  4. Step 4: Simplify right side
    645,906.20x = 489,297,740,820.54
  5. Step 5: Solve for x
    x = 489,297,740,820.54/645,906.20
  6. Step 6: Final answer
    x = 757,536.84

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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.