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Finding the Fourth Proportional to 396,858.79, 547,675 and 215,570.66

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Solution

The fourth proportional to 396,858.79, 547,675 and 215,570.66 is: 297,492.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,858.79 : 547,675 = 215,570.66 : x
  2. Step 2: Convert to fraction form
    396,858.79/547,675 = 215,570.66/x
  3. Step 3: Cross multiply
    396,858.79x = 547,675 × 215,570.66
  4. Step 4: Simplify right side
    396,858.79x = 118,062,661,215.50
  5. Step 5: Solve for x
    x = 118,062,661,215.50/396,858.79
  6. Step 6: Final answer
    x = 297,492.88

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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.