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Finding the Fourth Proportional to 422,940.63, 633,757.85 and 285,625.55

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Solution

The fourth proportional to 422,940.63, 633,757.85 and 285,625.55 is: 427,997.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,940.63 : 633,757.85 = 285,625.55 : x
  2. Step 2: Convert to fraction form
    422,940.63/633,757.85 = 285,625.55/x
  3. Step 3: Cross multiply
    422,940.63x = 633,757.85 × 285,625.55
  4. Step 4: Simplify right side
    422,940.63x = 181,017,435,788.33
  5. Step 5: Solve for x
    x = 181,017,435,788.33/422,940.63
  6. Step 6: Final answer
    x = 427,997.28

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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.