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Finding the Third Proportional to 398.75 and 616

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Solution

The third proportional to 398.75 and 616 is: 951.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.75 : 616 = 616 : x
  2. Step 2: Convert to fraction form
    398.75/616 = 616/x
  3. Step 3: Cross multiply
    398.75x = 616 × 616
  4. Step 4: Simplify right side
    398.75x = 379,456
  5. Step 5: Solve for x
    x = 379,456/398.75
  6. Step 6: Final answer
    x = 951.61

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These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.