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Finding the Third Proportional to 206,430.75 and 290,701.69

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Solution

The third proportional to 206,430.75 and 290,701.69 is: 409,374.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,430.75 : 290,701.69 = 290,701.69 : x
  2. Step 2: Convert to fraction form
    206,430.75/290,701.69 = 290,701.69/x
  3. Step 3: Cross multiply
    206,430.75x = 290,701.69 × 290,701.69
  4. Step 4: Simplify right side
    206,430.75x = 84,507,471,115.35
  5. Step 5: Solve for x
    x = 84,507,471,115.35/206,430.75
  6. Step 6: Final answer
    x = 409,374.43

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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.