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Finding the Fourth Proportional to 396,907.68, 547,733.64 and 215,618.13

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Solution

The fourth proportional to 396,907.68, 547,733.64 and 215,618.13 is: 297,553.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,907.68 : 547,733.64 = 215,618.13 : x
  2. Step 2: Convert to fraction form
    396,907.68/547,733.64 = 215,618.13/x
  3. Step 3: Cross multiply
    396,907.68x = 547,733.64 × 215,618.13
  4. Step 4: Simplify right side
    396,907.68x = 118,101,303,194.89
  5. Step 5: Solve for x
    x = 118,101,303,194.89/396,907.68
  6. Step 6: Final answer
    x = 297,553.59

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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.