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Finding the Fourth Proportional to 396,803.66, 547,593 and 215,519.16

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Solution

The fourth proportional to 396,803.66, 547,593 and 215,519.16 is: 297,418.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,803.66 : 547,593 = 215,519.16 : x
  2. Step 2: Convert to fraction form
    396,803.66/547,593 = 215,519.16/x
  3. Step 3: Cross multiply
    396,803.66x = 547,593 × 215,519.16
  4. Step 4: Simplify right side
    396,803.66x = 118,016,783,381.88
  5. Step 5: Solve for x
    x = 118,016,783,381.88/396,803.66
  6. Step 6: Final answer
    x = 297,418.59

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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.