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Finding the Third Proportional to 258,913 and 349,809

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Solution

The third proportional to 258,913 and 349,809 is: 472,615.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,913 : 349,809 = 349,809 : x
  2. Step 2: Convert to fraction form
    258,913/349,809 = 349,809/x
  3. Step 3: Cross multiply
    258,913x = 349,809 × 349,809
  4. Step 4: Simplify right side
    258,913x = 122,366,336,481
  5. Step 5: Solve for x
    x = 122,366,336,481/258,913
  6. Step 6: Final answer
    x = 472,615.65

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.