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Finding the Third Proportional to 683.50 and 1,385.75

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Solution

The third proportional to 683.50 and 1,385.75 is: 2,809.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.50 : 1,385.75 = 1,385.75 : x
  2. Step 2: Convert to fraction form
    683.50/1,385.75 = 1,385.75/x
  3. Step 3: Cross multiply
    683.50x = 1,385.75 × 1,385.75
  4. Step 4: Simplify right side
    683.50x = 1,920,303.06
  5. Step 5: Solve for x
    x = 1,920,303.06/683.50
  6. Step 6: Final answer
    x = 2,809.51

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.