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Finding the Third Proportional to 4,872 and 7,285

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Solution

The third proportional to 4,872 and 7,285 is: 10,893.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,872 : 7,285 = 7,285 : x
  2. Step 2: Convert to fraction form
    4,872/7,285 = 7,285/x
  3. Step 3: Cross multiply
    4,872x = 7,285 × 7,285
  4. Step 4: Simplify right side
    4,872x = 53,071,225
  5. Step 5: Solve for x
    x = 53,071,225/4,872
  6. Step 6: Final answer
    x = 10,893.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.