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Finding the Third Proportional to 5,220 and 6,345

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Solution

The third proportional to 5,220 and 6,345 is: 7,712.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220 : 6,345 = 6,345 : x
  2. Step 2: Convert to fraction form
    5,220/6,345 = 6,345/x
  3. Step 3: Cross multiply
    5,220x = 6,345 × 6,345
  4. Step 4: Simplify right side
    5,220x = 40,259,025
  5. Step 5: Solve for x
    x = 40,259,025/5,220
  6. Step 6: Final answer
    x = 7,712.46

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.