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Finding the Third Proportional to 128,786 and 282,176

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Solution

The third proportional to 128,786 and 282,176 is: 618,260.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,786 : 282,176 = 282,176 : x
  2. Step 2: Convert to fraction form
    128,786/282,176 = 282,176/x
  3. Step 3: Cross multiply
    128,786x = 282,176 × 282,176
  4. Step 4: Simplify right side
    128,786x = 79,623,294,976
  5. Step 5: Solve for x
    x = 79,623,294,976/128,786
  6. Step 6: Final answer
    x = 618,260.49

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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.