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Finding the Third Proportional to 27,780 and 38,889

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Solution

The third proportional to 27,780 and 38,889 is: 54,440.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,780 : 38,889 = 38,889 : x
  2. Step 2: Convert to fraction form
    27,780/38,889 = 38,889/x
  3. Step 3: Cross multiply
    27,780x = 38,889 × 38,889
  4. Step 4: Simplify right side
    27,780x = 1,512,354,321
  5. Step 5: Solve for x
    x = 1,512,354,321/27,780
  6. Step 6: Final answer
    x = 54,440.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.