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Finding the Third Proportional to 149,474 and 321,136

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Solution

The third proportional to 149,474 and 321,136 is: 689,941.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,474 : 321,136 = 321,136 : x
  2. Step 2: Convert to fraction form
    149,474/321,136 = 321,136/x
  3. Step 3: Cross multiply
    149,474x = 321,136 × 321,136
  4. Step 4: Simplify right side
    149,474x = 103,128,330,496
  5. Step 5: Solve for x
    x = 103,128,330,496/149,474
  6. Step 6: Final answer
    x = 689,941.60

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.