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Finding the Fourth Proportional to 396,817.31, 547,611.87 and 215,532.79

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Solution

The fourth proportional to 396,817.31, 547,611.87 and 215,532.79 is: 297,437.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,817.31 : 547,611.87 = 215,532.79 : x
  2. Step 2: Convert to fraction form
    396,817.31/547,611.87 = 215,532.79/x
  3. Step 3: Cross multiply
    396,817.31x = 547,611.87 × 215,532.79
  4. Step 4: Simplify right side
    396,817.31x = 118,028,314,178.22
  5. Step 5: Solve for x
    x = 118,028,314,178.22/396,817.31
  6. Step 6: Final answer
    x = 297,437.41

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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.