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Finding the Fourth Proportional to 396,554.46, 547,254.84 and 215,265.90

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Solution

The fourth proportional to 396,554.46, 547,254.84 and 215,265.90 is: 297,072.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,554.46 : 547,254.84 = 215,265.90 : x
  2. Step 2: Convert to fraction form
    396,554.46/547,254.84 = 215,265.90/x
  3. Step 3: Cross multiply
    396,554.46x = 547,254.84 × 215,265.90
  4. Step 4: Simplify right side
    396,554.46x = 117,805,305,661.96
  5. Step 5: Solve for x
    x = 117,805,305,661.96/396,554.46
  6. Step 6: Final answer
    x = 297,072.20

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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.