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Finding the Third Proportional to 1,688 and 2,956

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Solution

The third proportional to 1,688 and 2,956 is: 5,176.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688 : 2,956 = 2,956 : x
  2. Step 2: Convert to fraction form
    1,688/2,956 = 2,956/x
  3. Step 3: Cross multiply
    1,688x = 2,956 × 2,956
  4. Step 4: Simplify right side
    1,688x = 8,737,936
  5. Step 5: Solve for x
    x = 8,737,936/1,688
  6. Step 6: Final answer
    x = 5,176.50

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.