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Finding the Third Proportional to 381 and 702.75

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Solution

The third proportional to 381 and 702.75 is: 1,296.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    381 : 702.75 = 702.75 : x
  2. Step 2: Convert to fraction form
    381/702.75 = 702.75/x
  3. Step 3: Cross multiply
    381x = 702.75 × 702.75
  4. Step 4: Simplify right side
    381x = 493,857.56
  5. Step 5: Solve for x
    x = 493,857.56/381
  6. Step 6: Final answer
    x = 1,296.21

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.