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Finding the Fourth Proportional to 396,698.32, 547,428.68 and 215,406.32

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Solution

The fourth proportional to 396,698.32, 547,428.68 and 215,406.32 is: 297,252.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,698.32 : 547,428.68 = 215,406.32 : x
  2. Step 2: Convert to fraction form
    396,698.32/547,428.68 = 215,406.32/x
  3. Step 3: Cross multiply
    396,698.32x = 547,428.68 × 215,406.32
  4. Step 4: Simplify right side
    396,698.32x = 117,919,597,421.26
  5. Step 5: Solve for x
    x = 117,919,597,421.26/396,698.32
  6. Step 6: Final answer
    x = 297,252.58

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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.