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Finding the Third Proportional to 128,992.50 and 282,771

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Solution

The third proportional to 128,992.50 and 282,771 is: 619,876.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,992.50 : 282,771 = 282,771 : x
  2. Step 2: Convert to fraction form
    128,992.50/282,771 = 282,771/x
  3. Step 3: Cross multiply
    128,992.50x = 282,771 × 282,771
  4. Step 4: Simplify right side
    128,992.50x = 79,959,438,441
  5. Step 5: Solve for x
    x = 79,959,438,441/128,992.50
  6. Step 6: Final answer
    x = 619,876.65

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.