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Finding the Fourth Proportional to 396,287.75, 594,306.88 and 129,986.35

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Solution

The fourth proportional to 396,287.75, 594,306.88 and 129,986.35 is: 194,938.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,287.75 : 594,306.88 = 129,986.35 : x
  2. Step 2: Convert to fraction form
    396,287.75/594,306.88 = 129,986.35/x
  3. Step 3: Cross multiply
    396,287.75x = 594,306.88 × 129,986.35
  4. Step 4: Simplify right side
    396,287.75x = 77,251,782,111.09
  5. Step 5: Solve for x
    x = 77,251,782,111.09/396,287.75
  6. Step 6: Final answer
    x = 194,938.61

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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.