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Finding the Fourth Proportional to 396,450.97, 547,106.43 and 215,164.46

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Solution

The fourth proportional to 396,450.97, 547,106.43 and 215,164.46 is: 296,929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,450.97 : 547,106.43 = 215,164.46 : x
  2. Step 2: Convert to fraction form
    396,450.97/547,106.43 = 215,164.46/x
  3. Step 3: Cross multiply
    396,450.97x = 547,106.43 × 215,164.46
  4. Step 4: Simplify right side
    396,450.97x = 117,717,859,573.48
  5. Step 5: Solve for x
    x = 117,717,859,573.48/396,450.97
  6. Step 6: Final answer
    x = 296,929.18

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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.