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Finding the Third Proportional to 696.75 and 980.63

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Solution

The third proportional to 696.75 and 980.63 is: 1,380.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.75 : 980.63 = 980.63 : x
  2. Step 2: Convert to fraction form
    696.75/980.63 = 980.63/x
  3. Step 3: Cross multiply
    696.75x = 980.63 × 980.63
  4. Step 4: Simplify right side
    696.75x = 961,625.39
  5. Step 5: Solve for x
    x = 961,625.39/696.75
  6. Step 6: Final answer
    x = 1,380.16

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.