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Finding the Fourth Proportional to 396,907.97, 547,736.78 and 215,621.26

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Solution

The fourth proportional to 396,907.97, 547,736.78 and 215,621.26 is: 297,559.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,907.97 : 547,736.78 = 215,621.26 : x
  2. Step 2: Convert to fraction form
    396,907.97/547,736.78 = 215,621.26/x
  3. Step 3: Cross multiply
    396,907.97x = 547,736.78 × 215,621.26
  4. Step 4: Simplify right side
    396,907.97x = 118,103,693,821.65
  5. Step 5: Solve for x
    x = 118,103,693,821.65/396,907.97
  6. Step 6: Final answer
    x = 297,559.39

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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.