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Finding the Fourth Proportional to 633,555.60, 874,306.68 and 378,906.78

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Solution

The fourth proportional to 633,555.60, 874,306.68 and 378,906.78 is: 522,891.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,555.60 : 874,306.68 = 378,906.78 : x
  2. Step 2: Convert to fraction form
    633,555.60/874,306.68 = 378,906.78/x
  3. Step 3: Cross multiply
    633,555.60x = 874,306.68 × 378,906.78
  4. Step 4: Simplify right side
    633,555.60x = 331,280,728,851.29
  5. Step 5: Solve for x
    x = 331,280,728,851.29/633,555.60
  6. Step 6: Final answer
    x = 522,891.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.