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Finding the Third Proportional to 170,700 and 258,408

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Solution

The third proportional to 170,700 and 258,408 is: 391,181.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,700 : 258,408 = 258,408 : x
  2. Step 2: Convert to fraction form
    170,700/258,408 = 258,408/x
  3. Step 3: Cross multiply
    170,700x = 258,408 × 258,408
  4. Step 4: Simplify right side
    170,700x = 66,774,694,464
  5. Step 5: Solve for x
    x = 66,774,694,464/170,700
  6. Step 6: Final answer
    x = 391,181.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.