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Finding the Third Proportional to 3,968 and 7,315

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Solution

The third proportional to 3,968 and 7,315 is: 13,485.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968 : 7,315 = 7,315 : x
  2. Step 2: Convert to fraction form
    3,968/7,315 = 7,315/x
  3. Step 3: Cross multiply
    3,968x = 7,315 × 7,315
  4. Step 4: Simplify right side
    3,968x = 53,509,225
  5. Step 5: Solve for x
    x = 53,509,225/3,968
  6. Step 6: Final answer
    x = 13,485.19

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.