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Finding the Fourth Proportional to 396,873.02, 547,474.79 and 251,422.20

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Solution

The fourth proportional to 396,873.02, 547,474.79 and 251,422.20 is: 346,829.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,873.02 : 547,474.79 = 251,422.20 : x
  2. Step 2: Convert to fraction form
    396,873.02/547,474.79 = 251,422.20/x
  3. Step 3: Cross multiply
    396,873.02x = 547,474.79 × 251,422.20
  4. Step 4: Simplify right side
    396,873.02x = 137,647,314,889.23
  5. Step 5: Solve for x
    x = 137,647,314,889.23/396,873.02
  6. Step 6: Final answer
    x = 346,829.61

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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.