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Finding the Fourth Proportional to 422,418.20, 633,627.30 and 394,424.60

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Solution

The fourth proportional to 422,418.20, 633,627.30 and 394,424.60 is: 591,636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,418.20 : 633,627.30 = 394,424.60 : x
  2. Step 2: Convert to fraction form
    422,418.20/633,627.30 = 394,424.60/x
  3. Step 3: Cross multiply
    422,418.20x = 633,627.30 × 394,424.60
  4. Step 4: Simplify right side
    422,418.20x = 249,918,194,351.58
  5. Step 5: Solve for x
    x = 249,918,194,351.58/422,418.20
  6. Step 6: Final answer
    x = 591,636.90

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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.