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Finding the Third Proportional to 239,318 and 518,258

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Solution

The third proportional to 239,318 and 518,258 is: 1,122,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,318 : 518,258 = 518,258 : x
  2. Step 2: Convert to fraction form
    239,318/518,258 = 518,258/x
  3. Step 3: Cross multiply
    239,318x = 518,258 × 518,258
  4. Step 4: Simplify right side
    239,318x = 268,591,354,564
  5. Step 5: Solve for x
    x = 268,591,354,564/239,318
  6. Step 6: Final answer
    x = 1,122,319.90

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.