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Finding the Fourth Proportional to 396,514.80, 547,175.79 and 215,222.90

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Solution

The fourth proportional to 396,514.80, 547,175.79 and 215,222.90 is: 296,999.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,514.80 : 547,175.79 = 215,222.90 : x
  2. Step 2: Convert to fraction form
    396,514.80/547,175.79 = 215,222.90/x
  3. Step 3: Cross multiply
    396,514.80x = 547,175.79 × 215,222.90
  4. Step 4: Simplify right side
    396,514.80x = 117,764,757,597.71
  5. Step 5: Solve for x
    x = 117,764,757,597.71/396,514.80
  6. Step 6: Final answer
    x = 296,999.65

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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.