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Finding the Fourth Proportional to 396,392.76, 547,019.28 and 215,100.12

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Solution

The fourth proportional to 396,392.76, 547,019.28 and 215,100.12 is: 296,836.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,392.76 : 547,019.28 = 215,100.12 : x
  2. Step 2: Convert to fraction form
    396,392.76/547,019.28 = 215,100.12/x
  3. Step 3: Cross multiply
    396,392.76x = 547,019.28 × 215,100.12
  4. Step 4: Simplify right side
    396,392.76x = 117,663,912,770.31
  5. Step 5: Solve for x
    x = 117,663,912,770.31/396,392.76
  6. Step 6: Final answer
    x = 296,836.68

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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.