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Finding the Fourth Proportional to 396,642.52, 547,369.54 and 215,354.57

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Solution

The fourth proportional to 396,642.52, 547,369.54 and 215,354.57 is: 297,190.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,642.52 : 547,369.54 = 215,354.57 : x
  2. Step 2: Convert to fraction form
    396,642.52/547,369.54 = 215,354.57/x
  3. Step 3: Cross multiply
    396,642.52x = 547,369.54 × 215,354.57
  4. Step 4: Simplify right side
    396,642.52x = 117,878,532,958.15
  5. Step 5: Solve for x
    x = 117,878,532,958.15/396,642.52
  6. Step 6: Final answer
    x = 297,190.86

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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.