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Finding the Third Proportional to 209,064 and 318,512

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Solution

The third proportional to 209,064 and 318,512 is: 485,257.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,064 : 318,512 = 318,512 : x
  2. Step 2: Convert to fraction form
    209,064/318,512 = 318,512/x
  3. Step 3: Cross multiply
    209,064x = 318,512 × 318,512
  4. Step 4: Simplify right side
    209,064x = 101,449,894,144
  5. Step 5: Solve for x
    x = 101,449,894,144/209,064
  6. Step 6: Final answer
    x = 485,257.60

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.