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Finding the Fourth Proportional to 396,555.46, 547,256.22 and 215,266.90

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Solution

The fourth proportional to 396,555.46, 547,256.22 and 215,266.90 is: 297,073.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,555.46 : 547,256.22 = 215,266.90 : x
  2. Step 2: Convert to fraction form
    396,555.46/547,256.22 = 215,266.90/x
  3. Step 3: Cross multiply
    396,555.46x = 547,256.22 × 215,266.90
  4. Step 4: Simplify right side
    396,555.46x = 117,806,149,985.12
  5. Step 5: Solve for x
    x = 117,806,149,985.12/396,555.46
  6. Step 6: Final answer
    x = 297,073.58

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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.