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Finding the Third Proportional to 683.63 and 705.75

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Solution

The third proportional to 683.63 and 705.75 is: 728.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.63 : 705.75 = 705.75 : x
  2. Step 2: Convert to fraction form
    683.63/705.75 = 705.75/x
  3. Step 3: Cross multiply
    683.63x = 705.75 × 705.75
  4. Step 4: Simplify right side
    683.63x = 498,083.06
  5. Step 5: Solve for x
    x = 498,083.06/683.63
  6. Step 6: Final answer
    x = 728.59

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Why These Related Problems?

These problems maintain the same ratio (1.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.