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Finding the Third Proportional to 258,909 and 349,803

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Solution

The third proportional to 258,909 and 349,803 is: 472,606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,909 : 349,803 = 349,803 : x
  2. Step 2: Convert to fraction form
    258,909/349,803 = 349,803/x
  3. Step 3: Cross multiply
    258,909x = 349,803 × 349,803
  4. Step 4: Simplify right side
    258,909x = 122,362,138,809
  5. Step 5: Solve for x
    x = 122,362,138,809/258,909
  6. Step 6: Final answer
    x = 472,606.74

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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.