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Finding the Third Proportional to 308.88 and 666.63

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Solution

The third proportional to 308.88 and 666.63 is: 1,438.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.88 : 666.63 = 666.63 : x
  2. Step 2: Convert to fraction form
    308.88/666.63 = 666.63/x
  3. Step 3: Cross multiply
    308.88x = 666.63 × 666.63
  4. Step 4: Simplify right side
    308.88x = 444,388.89
  5. Step 5: Solve for x
    x = 444,388.89/308.88
  6. Step 6: Final answer
    x = 1,438.73

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.