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Finding the Third Proportional to 5,170 and 6,639

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Solution

The third proportional to 5,170 and 6,639 is: 8,525.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,170 : 6,639 = 6,639 : x
  2. Step 2: Convert to fraction form
    5,170/6,639 = 6,639/x
  3. Step 3: Cross multiply
    5,170x = 6,639 × 6,639
  4. Step 4: Simplify right side
    5,170x = 44,076,321
  5. Step 5: Solve for x
    x = 44,076,321/5,170
  6. Step 6: Final answer
    x = 8,525.40

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.