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Finding the Third Proportional to 155,306 and 339,690

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Solution

The third proportional to 155,306 and 339,690 is: 742,980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,306 : 339,690 = 339,690 : x
  2. Step 2: Convert to fraction form
    155,306/339,690 = 339,690/x
  3. Step 3: Cross multiply
    155,306x = 339,690 × 339,690
  4. Step 4: Simplify right side
    155,306x = 115,389,296,100
  5. Step 5: Solve for x
    x = 115,389,296,100/155,306
  6. Step 6: Final answer
    x = 742,980.28

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.