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Finding the Fourth Proportional to 396,297.76, 594,321.84 and 129,996.40

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Solution

The fourth proportional to 396,297.76, 594,321.84 and 129,996.40 is: 194,953.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,297.76 : 594,321.84 = 129,996.40 : x
  2. Step 2: Convert to fraction form
    396,297.76/594,321.84 = 129,996.40/x
  3. Step 3: Cross multiply
    396,297.76x = 594,321.84 × 129,996.40
  4. Step 4: Simplify right side
    396,297.76x = 77,259,699,641.38
  5. Step 5: Solve for x
    x = 77,259,699,641.38/396,297.76
  6. Step 6: Final answer
    x = 194,953.66

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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.