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Finding the Third Proportional to 172,428.75 and 256,181.25

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Solution

The third proportional to 172,428.75 and 256,181.25 is: 380,614.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,428.75 : 256,181.25 = 256,181.25 : x
  2. Step 2: Convert to fraction form
    172,428.75/256,181.25 = 256,181.25/x
  3. Step 3: Cross multiply
    172,428.75x = 256,181.25 × 256,181.25
  4. Step 4: Simplify right side
    172,428.75x = 65,628,832,851.56
  5. Step 5: Solve for x
    x = 65,628,832,851.56/172,428.75
  6. Step 6: Final answer
    x = 380,614.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.