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Finding the Third Proportional to 3,405.75 and 7,307.25

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Solution

The third proportional to 3,405.75 and 7,307.25 is: 15,678.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.75 : 7,307.25 = 7,307.25 : x
  2. Step 2: Convert to fraction form
    3,405.75/7,307.25 = 7,307.25/x
  3. Step 3: Cross multiply
    3,405.75x = 7,307.25 × 7,307.25
  4. Step 4: Simplify right side
    3,405.75x = 53,395,902.56
  5. Step 5: Solve for x
    x = 53,395,902.56/3,405.75
  6. Step 6: Final answer
    x = 15,678.16

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.