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Finding the Third Proportional to 139,317 and 305,343

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Solution

The third proportional to 139,317 and 305,343 is: 669,224.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,317 : 305,343 = 305,343 : x
  2. Step 2: Convert to fraction form
    139,317/305,343 = 305,343/x
  3. Step 3: Cross multiply
    139,317x = 305,343 × 305,343
  4. Step 4: Simplify right side
    139,317x = 93,234,347,649
  5. Step 5: Solve for x
    x = 93,234,347,649/139,317
  6. Step 6: Final answer
    x = 669,224.49

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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.