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Finding the Fourth Proportional to 396,839.36, 547,648 and 215,549.22

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Solution

The fourth proportional to 396,839.36, 547,648 and 215,549.22 is: 297,463.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,839.36 : 547,648 = 215,549.22 : x
  2. Step 2: Convert to fraction form
    396,839.36/547,648 = 215,549.22/x
  3. Step 3: Cross multiply
    396,839.36x = 547,648 × 215,549.22
  4. Step 4: Simplify right side
    396,839.36x = 118,045,099,234.56
  5. Step 5: Solve for x
    x = 118,045,099,234.56/396,839.36
  6. Step 6: Final answer
    x = 297,463.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.