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Finding the Third Proportional to 156,989 and 339,736

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Solution

The third proportional to 156,989 and 339,736 is: 735,214.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989 : 339,736 = 339,736 : x
  2. Step 2: Convert to fraction form
    156,989/339,736 = 339,736/x
  3. Step 3: Cross multiply
    156,989x = 339,736 × 339,736
  4. Step 4: Simplify right side
    156,989x = 115,420,549,696
  5. Step 5: Solve for x
    x = 115,420,549,696/156,989
  6. Step 6: Final answer
    x = 735,214.25

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.