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Finding the Fourth Proportional to 396,069.40, 594,249.90 and 129,838.60

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Solution

The fourth proportional to 396,069.40, 594,249.90 and 129,838.60 is: 194,805.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,069.40 : 594,249.90 = 129,838.60 : x
  2. Step 2: Convert to fraction form
    396,069.40/594,249.90 = 129,838.60/x
  3. Step 3: Cross multiply
    396,069.40x = 594,249.90 × 129,838.60
  4. Step 4: Simplify right side
    396,069.40x = 77,156,575,066.14
  5. Step 5: Solve for x
    x = 77,156,575,066.14/396,069.40
  6. Step 6: Final answer
    x = 194,805.70

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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.