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Finding the Third Proportional to 121,029.75 and 256,455

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Solution

The third proportional to 121,029.75 and 256,455 is: 543,413.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,029.75 : 256,455 = 256,455 : x
  2. Step 2: Convert to fraction form
    121,029.75/256,455 = 256,455/x
  3. Step 3: Cross multiply
    121,029.75x = 256,455 × 256,455
  4. Step 4: Simplify right side
    121,029.75x = 65,769,167,025
  5. Step 5: Solve for x
    x = 65,769,167,025/121,029.75
  6. Step 6: Final answer
    x = 543,413.23

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.