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Finding the Third Proportional to 3,116 and 7,278

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Solution

The third proportional to 3,116 and 7,278 is: 16,999.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116 : 7,278 = 7,278 : x
  2. Step 2: Convert to fraction form
    3,116/7,278 = 7,278/x
  3. Step 3: Cross multiply
    3,116x = 7,278 × 7,278
  4. Step 4: Simplify right side
    3,116x = 52,969,284
  5. Step 5: Solve for x
    x = 52,969,284/3,116
  6. Step 6: Final answer
    x = 16,999.13

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.