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Finding the Third Proportional to 239,979 and 518,445

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Solution

The third proportional to 239,979 and 518,445 is: 1,120,036.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,979 : 518,445 = 518,445 : x
  2. Step 2: Convert to fraction form
    239,979/518,445 = 518,445/x
  3. Step 3: Cross multiply
    239,979x = 518,445 × 518,445
  4. Step 4: Simplify right side
    239,979x = 268,785,218,025
  5. Step 5: Solve for x
    x = 268,785,218,025/239,979
  6. Step 6: Final answer
    x = 1,120,036.41

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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.