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Finding the Third Proportional to 2,972 and 7,798

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Solution

The third proportional to 2,972 and 7,798 is: 20,460.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,972 : 7,798 = 7,798 : x
  2. Step 2: Convert to fraction form
    2,972/7,798 = 7,798/x
  3. Step 3: Cross multiply
    2,972x = 7,798 × 7,798
  4. Step 4: Simplify right side
    2,972x = 60,808,804
  5. Step 5: Solve for x
    x = 60,808,804/2,972
  6. Step 6: Final answer
    x = 20,460.57

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Why These Related Problems?

These problems maintain the same ratio (2.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.