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Finding the Third Proportional to 666.75 and 1,656.75

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Solution

The third proportional to 666.75 and 1,656.75 is: 4,116.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.75 : 1,656.75 = 1,656.75 : x
  2. Step 2: Convert to fraction form
    666.75/1,656.75 = 1,656.75/x
  3. Step 3: Cross multiply
    666.75x = 1,656.75 × 1,656.75
  4. Step 4: Simplify right side
    666.75x = 2,744,820.56
  5. Step 5: Solve for x
    x = 2,744,820.56/666.75
  6. Step 6: Final answer
    x = 4,116.72

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Why These Related Problems?

These problems maintain the same ratio (2.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.