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Finding the Third Proportional to 258,934.50 and 387,321.75

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Solution

The third proportional to 258,934.50 and 387,321.75 is: 579,367.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,934.50 : 387,321.75 = 387,321.75 : x
  2. Step 2: Convert to fraction form
    258,934.50/387,321.75 = 387,321.75/x
  3. Step 3: Cross multiply
    258,934.50x = 387,321.75 × 387,321.75
  4. Step 4: Simplify right side
    258,934.50x = 150,018,138,023.06
  5. Step 5: Solve for x
    x = 150,018,138,023.06/258,934.50
  6. Step 6: Final answer
    x = 579,367.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.