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Finding the Third Proportional to 628.75 and 730.75

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Solution

The third proportional to 628.75 and 730.75 is: 849.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.75 : 730.75 = 730.75 : x
  2. Step 2: Convert to fraction form
    628.75/730.75 = 730.75/x
  3. Step 3: Cross multiply
    628.75x = 730.75 × 730.75
  4. Step 4: Simplify right side
    628.75x = 533,995.56
  5. Step 5: Solve for x
    x = 533,995.56/628.75
  6. Step 6: Final answer
    x = 849.30

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.