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Finding the Third Proportional to 121,328 and 200,457

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Solution

The third proportional to 121,328 and 200,457 is: 331,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,328 : 200,457 = 200,457 : x
  2. Step 2: Convert to fraction form
    121,328/200,457 = 200,457/x
  3. Step 3: Cross multiply
    121,328x = 200,457 × 200,457
  4. Step 4: Simplify right side
    121,328x = 40,183,008,849
  5. Step 5: Solve for x
    x = 40,183,008,849/121,328
  6. Step 6: Final answer
    x = 331,193.20

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.