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Finding the Third Proportional to 255,450 and 386,713

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Solution

The third proportional to 255,450 and 386,713 is: 585,425.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,450 : 386,713 = 386,713 : x
  2. Step 2: Convert to fraction form
    255,450/386,713 = 386,713/x
  3. Step 3: Cross multiply
    255,450x = 386,713 × 386,713
  4. Step 4: Simplify right side
    255,450x = 149,546,944,369
  5. Step 5: Solve for x
    x = 149,546,944,369/255,450
  6. Step 6: Final answer
    x = 585,425.50

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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.