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Finding the Third Proportional to 206,429.50 and 290,699

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Solution

The third proportional to 206,429.50 and 290,699 is: 409,369.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,429.50 : 290,699 = 290,699 : x
  2. Step 2: Convert to fraction form
    206,429.50/290,699 = 290,699/x
  3. Step 3: Cross multiply
    206,429.50x = 290,699 × 290,699
  4. Step 4: Simplify right side
    206,429.50x = 84,505,908,601
  5. Step 5: Solve for x
    x = 84,505,908,601/206,429.50
  6. Step 6: Final answer
    x = 409,369.34

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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.