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Finding the Third Proportional to 1,642 and 3,515

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Solution

The third proportional to 1,642 and 3,515 is: 7,524.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642 : 3,515 = 3,515 : x
  2. Step 2: Convert to fraction form
    1,642/3,515 = 3,515/x
  3. Step 3: Cross multiply
    1,642x = 3,515 × 3,515
  4. Step 4: Simplify right side
    1,642x = 12,355,225
  5. Step 5: Solve for x
    x = 12,355,225/1,642
  6. Step 6: Final answer
    x = 7,524.50

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.