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Finding the Third Proportional to 387,339 and 528,067

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Solution

The third proportional to 387,339 and 528,067 is: 719,924.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,339 : 528,067 = 528,067 : x
  2. Step 2: Convert to fraction form
    387,339/528,067 = 528,067/x
  3. Step 3: Cross multiply
    387,339x = 528,067 × 528,067
  4. Step 4: Simplify right side
    387,339x = 278,854,756,489
  5. Step 5: Solve for x
    x = 278,854,756,489/387,339
  6. Step 6: Final answer
    x = 719,924.29

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.