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Finding the Third Proportional to 317,905 and 445,608

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Solution

The third proportional to 317,905 and 445,608 is: 624,609.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,905 : 445,608 = 445,608 : x
  2. Step 2: Convert to fraction form
    317,905/445,608 = 445,608/x
  3. Step 3: Cross multiply
    317,905x = 445,608 × 445,608
  4. Step 4: Simplify right side
    317,905x = 198,566,489,664
  5. Step 5: Solve for x
    x = 198,566,489,664/317,905
  6. Step 6: Final answer
    x = 624,609.52

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.