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Finding the Third Proportional to 3,315 and 5,174

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Solution

The third proportional to 3,315 and 5,174 is: 8,075.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315 : 5,174 = 5,174 : x
  2. Step 2: Convert to fraction form
    3,315/5,174 = 5,174/x
  3. Step 3: Cross multiply
    3,315x = 5,174 × 5,174
  4. Step 4: Simplify right side
    3,315x = 26,770,276
  5. Step 5: Solve for x
    x = 26,770,276/3,315
  6. Step 6: Final answer
    x = 8,075.50

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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.