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Finding the Third Proportional to 2,688 and 3,148

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Solution

The third proportional to 2,688 and 3,148 is: 3,686.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688 : 3,148 = 3,148 : x
  2. Step 2: Convert to fraction form
    2,688/3,148 = 3,148/x
  3. Step 3: Cross multiply
    2,688x = 3,148 × 3,148
  4. Step 4: Simplify right side
    2,688x = 9,909,904
  5. Step 5: Solve for x
    x = 9,909,904/2,688
  6. Step 6: Final answer
    x = 3,686.72

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.