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Finding the Fourth Proportional to 396,418.10, 594,791.31 and 218,909.30

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Solution

The fourth proportional to 396,418.10, 594,791.31 and 218,909.30 is: 328,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,418.10 : 594,791.31 = 218,909.30 : x
  2. Step 2: Convert to fraction form
    396,418.10/594,791.31 = 218,909.30/x
  3. Step 3: Cross multiply
    396,418.10x = 594,791.31 × 218,909.30
  4. Step 4: Simplify right side
    396,418.10x = 130,205,349,318.18
  5. Step 5: Solve for x
    x = 130,205,349,318.18/396,418.10
  6. Step 6: Final answer
    x = 328,454.60

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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.