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Finding the Third Proportional to 331.75 and 782.88

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Solution

The third proportional to 331.75 and 782.88 is: 1,847.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.75 : 782.88 = 782.88 : x
  2. Step 2: Convert to fraction form
    331.75/782.88 = 782.88/x
  3. Step 3: Cross multiply
    331.75x = 782.88 × 782.88
  4. Step 4: Simplify right side
    331.75x = 612,893.27
  5. Step 5: Solve for x
    x = 612,893.27/331.75
  6. Step 6: Final answer
    x = 1,847.46

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.