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Finding the Third Proportional to 339.19 and 666.84

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Solution

The third proportional to 339.19 and 666.84 is: 1,311.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.19 : 666.84 = 666.84 : x
  2. Step 2: Convert to fraction form
    339.19/666.84 = 666.84/x
  3. Step 3: Cross multiply
    339.19x = 666.84 × 666.84
  4. Step 4: Simplify right side
    339.19x = 444,680.59
  5. Step 5: Solve for x
    x = 444,680.59/339.19
  6. Step 6: Final answer
    x = 1,311.02

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.