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Finding the Fourth Proportional to 422,447.80, 632,505.30 and 329,135.80

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Solution

The fourth proportional to 422,447.80, 632,505.30 and 329,135.80 is: 492,794.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,447.80 : 632,505.30 = 329,135.80 : x
  2. Step 2: Convert to fraction form
    422,447.80/632,505.30 = 329,135.80/x
  3. Step 3: Cross multiply
    422,447.80x = 632,505.30 × 329,135.80
  4. Step 4: Simplify right side
    422,447.80x = 208,180,137,919.74
  5. Step 5: Solve for x
    x = 208,180,137,919.74/422,447.80
  6. Step 6: Final answer
    x = 492,794.94

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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.