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Finding the Third Proportional to 212,790.38 and 321,725.25

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Solution

The third proportional to 212,790.38 and 321,725.25 is: 486,427.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,790.38 : 321,725.25 = 321,725.25 : x
  2. Step 2: Convert to fraction form
    212,790.38/321,725.25 = 321,725.25/x
  3. Step 3: Cross multiply
    212,790.38x = 321,725.25 × 321,725.25
  4. Step 4: Simplify right side
    212,790.38x = 103,507,136,487.56
  5. Step 5: Solve for x
    x = 103,507,136,487.56/212,790.38
  6. Step 6: Final answer
    x = 486,427.72

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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.