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Finding the Fourth Proportional to 396,408.34, 547,043.86 and 215,120.26

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Solution

The fourth proportional to 396,408.34, 547,043.86 and 215,120.26 is: 296,866.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,408.34 : 547,043.86 = 215,120.26 : x
  2. Step 2: Convert to fraction form
    396,408.34/547,043.86 = 215,120.26/x
  3. Step 3: Cross multiply
    396,408.34x = 547,043.86 × 215,120.26
  4. Step 4: Simplify right side
    396,408.34x = 117,680,217,394.60
  5. Step 5: Solve for x
    x = 117,680,217,394.60/396,408.34
  6. Step 6: Final answer
    x = 296,866.15

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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.