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Finding the Third Proportional to 1,489 and 2,065

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Solution

The third proportional to 1,489 and 2,065 is: 2,863.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489 : 2,065 = 2,065 : x
  2. Step 2: Convert to fraction form
    1,489/2,065 = 2,065/x
  3. Step 3: Cross multiply
    1,489x = 2,065 × 2,065
  4. Step 4: Simplify right side
    1,489x = 4,264,225
  5. Step 5: Solve for x
    x = 4,264,225/1,489
  6. Step 6: Final answer
    x = 2,863.82

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.