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Finding the Fourth Proportional to 396,423.72, 547,068.74 and 215,137.21

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Solution

The fourth proportional to 396,423.72, 547,068.74 and 215,137.21 is: 296,891.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,423.72 : 547,068.74 = 215,137.21 : x
  2. Step 2: Convert to fraction form
    396,423.72/547,068.74 = 215,137.21/x
  3. Step 3: Cross multiply
    396,423.72x = 547,068.74 × 215,137.21
  4. Step 4: Simplify right side
    396,423.72x = 117,694,842,401.82
  5. Step 5: Solve for x
    x = 117,694,842,401.82/396,423.72
  6. Step 6: Final answer
    x = 296,891.52

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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.