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Finding the Third Proportional to 4,860 and 7,280

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Solution

The third proportional to 4,860 and 7,280 is: 10,905.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,860 : 7,280 = 7,280 : x
  2. Step 2: Convert to fraction form
    4,860/7,280 = 7,280/x
  3. Step 3: Cross multiply
    4,860x = 7,280 × 7,280
  4. Step 4: Simplify right side
    4,860x = 52,998,400
  5. Step 5: Solve for x
    x = 52,998,400/4,860
  6. Step 6: Final answer
    x = 10,905.02

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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.