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Finding the Fourth Proportional to 621,620.78, 932,431.40 and 279,664.85

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Solution

The fourth proportional to 621,620.78, 932,431.40 and 279,664.85 is: 419,497.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,620.78 : 932,431.40 = 279,664.85 : x
  2. Step 2: Convert to fraction form
    621,620.78/932,431.40 = 279,664.85/x
  3. Step 3: Cross multiply
    621,620.78x = 932,431.40 × 279,664.85
  4. Step 4: Simplify right side
    621,620.78x = 260,768,287,846.25
  5. Step 5: Solve for x
    x = 260,768,287,846.25/621,620.78
  6. Step 6: Final answer
    x = 419,497.38

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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.