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Finding the Third Proportional to 2,155 and 3,300

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Solution

The third proportional to 2,155 and 3,300 is: 5,053.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155 : 3,300 = 3,300 : x
  2. Step 2: Convert to fraction form
    2,155/3,300 = 3,300/x
  3. Step 3: Cross multiply
    2,155x = 3,300 × 3,300
  4. Step 4: Simplify right side
    2,155x = 10,890,000
  5. Step 5: Solve for x
    x = 10,890,000/2,155
  6. Step 6: Final answer
    x = 5,053.36

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.