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Finding the Fourth Proportional to 396,552.78, 547,243.20 and 215,264.70

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Solution

The fourth proportional to 396,552.78, 547,243.20 and 215,264.70 is: 297,065.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,552.78 : 547,243.20 = 215,264.70 : x
  2. Step 2: Convert to fraction form
    396,552.78/547,243.20 = 215,264.70/x
  3. Step 3: Cross multiply
    396,552.78x = 547,243.20 × 215,264.70
  4. Step 4: Simplify right side
    396,552.78x = 117,802,143,275.04
  5. Step 5: Solve for x
    x = 117,802,143,275.04/396,552.78
  6. Step 6: Final answer
    x = 297,065.48

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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.