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Finding the Third Proportional to 143,321 and 200,455

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Solution

The third proportional to 143,321 and 200,455 is: 280,365.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,321 : 200,455 = 200,455 : x
  2. Step 2: Convert to fraction form
    143,321/200,455 = 200,455/x
  3. Step 3: Cross multiply
    143,321x = 200,455 × 200,455
  4. Step 4: Simplify right side
    143,321x = 40,182,207,025
  5. Step 5: Solve for x
    x = 40,182,207,025/143,321
  6. Step 6: Final answer
    x = 280,365.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.