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Finding the Fourth Proportional to 396,491.25, 547,158.49 and 215,203.23

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Solution

The fourth proportional to 396,491.25, 547,158.49 and 215,203.23 is: 296,980.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,491.25 : 547,158.49 = 215,203.23 : x
  2. Step 2: Convert to fraction form
    396,491.25/547,158.49 = 215,203.23/x
  3. Step 3: Cross multiply
    396,491.25x = 547,158.49 × 215,203.23
  4. Step 4: Simplify right side
    396,491.25x = 117,750,275,042.43
  5. Step 5: Solve for x
    x = 117,750,275,042.43/396,491.25
  6. Step 6: Final answer
    x = 296,980.76

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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.