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Finding the Third Proportional to 679 and 1,465

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Solution

The third proportional to 679 and 1,465 is: 3,160.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    679 : 1,465 = 1,465 : x
  2. Step 2: Convert to fraction form
    679/1,465 = 1,465/x
  3. Step 3: Cross multiply
    679x = 1,465 × 1,465
  4. Step 4: Simplify right side
    679x = 2,146,225
  5. Step 5: Solve for x
    x = 2,146,225/679
  6. Step 6: Final answer
    x = 3,160.86

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.