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Finding the Fourth Proportional to 396,858.89, 547,670.23 and 215,573.87

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Solution

The fourth proportional to 396,858.89, 547,670.23 and 215,573.87 is: 297,494.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,858.89 : 547,670.23 = 215,573.87 : x
  2. Step 2: Convert to fraction form
    396,858.89/547,670.23 = 215,573.87/x
  3. Step 3: Cross multiply
    396,858.89x = 547,670.23 × 215,573.87
  4. Step 4: Simplify right side
    396,858.89x = 118,063,391,795.13
  5. Step 5: Solve for x
    x = 118,063,391,795.13/396,858.89
  6. Step 6: Final answer
    x = 297,494.64

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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.