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Finding the Third Proportional to 218,161 and 320,056

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Solution

The third proportional to 218,161 and 320,056 is: 469,542.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,161 : 320,056 = 320,056 : x
  2. Step 2: Convert to fraction form
    218,161/320,056 = 320,056/x
  3. Step 3: Cross multiply
    218,161x = 320,056 × 320,056
  4. Step 4: Simplify right side
    218,161x = 102,435,843,136
  5. Step 5: Solve for x
    x = 102,435,843,136/218,161
  6. Step 6: Final answer
    x = 469,542.42

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.