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Finding the Third Proportional to 206,430.50 and 290,692

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Solution

The third proportional to 206,430.50 and 290,692 is: 409,347.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,430.50 : 290,692 = 290,692 : x
  2. Step 2: Convert to fraction form
    206,430.50/290,692 = 290,692/x
  3. Step 3: Cross multiply
    206,430.50x = 290,692 × 290,692
  4. Step 4: Simplify right side
    206,430.50x = 84,501,838,864
  5. Step 5: Solve for x
    x = 84,501,838,864/206,430.50
  6. Step 6: Final answer
    x = 409,347.64

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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.