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Finding the Third Proportional to 2,421 and 3,618

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Solution

The third proportional to 2,421 and 3,618 is: 5,406.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421 : 3,618 = 3,618 : x
  2. Step 2: Convert to fraction form
    2,421/3,618 = 3,618/x
  3. Step 3: Cross multiply
    2,421x = 3,618 × 3,618
  4. Step 4: Simplify right side
    2,421x = 13,089,924
  5. Step 5: Solve for x
    x = 13,089,924/2,421
  6. Step 6: Final answer
    x = 5,406.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.