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Finding the Third Proportional to 1,639 and 3,565

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Solution

The third proportional to 1,639 and 3,565 is: 7,754.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639 : 3,565 = 3,565 : x
  2. Step 2: Convert to fraction form
    1,639/3,565 = 3,565/x
  3. Step 3: Cross multiply
    1,639x = 3,565 × 3,565
  4. Step 4: Simplify right side
    1,639x = 12,709,225
  5. Step 5: Solve for x
    x = 12,709,225/1,639
  6. Step 6: Final answer
    x = 7,754.26

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.