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Finding the Third Proportional to 619.75 and 700.75

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Solution

The third proportional to 619.75 and 700.75 is: 792.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.75 : 700.75 = 700.75 : x
  2. Step 2: Convert to fraction form
    619.75/700.75 = 700.75/x
  3. Step 3: Cross multiply
    619.75x = 700.75 × 700.75
  4. Step 4: Simplify right side
    619.75x = 491,050.56
  5. Step 5: Solve for x
    x = 491,050.56/619.75
  6. Step 6: Final answer
    x = 792.34

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.