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Finding the Third Proportional to 1,647 and 3,618

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Solution

The third proportional to 1,647 and 3,618 is: 7,947.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647 : 3,618 = 3,618 : x
  2. Step 2: Convert to fraction form
    1,647/3,618 = 3,618/x
  3. Step 3: Cross multiply
    1,647x = 3,618 × 3,618
  4. Step 4: Simplify right side
    1,647x = 13,089,924
  5. Step 5: Solve for x
    x = 13,089,924/1,647
  6. Step 6: Final answer
    x = 7,947.74

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.