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Finding the Third Proportional to 4,780 and 7,450

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Solution

The third proportional to 4,780 and 7,450 is: 11,611.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780 : 7,450 = 7,450 : x
  2. Step 2: Convert to fraction form
    4,780/7,450 = 7,450/x
  3. Step 3: Cross multiply
    4,780x = 7,450 × 7,450
  4. Step 4: Simplify right side
    4,780x = 55,502,500
  5. Step 5: Solve for x
    x = 55,502,500/4,780
  6. Step 6: Final answer
    x = 11,611.40

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.