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Finding the Third Proportional to 447 and 690.66

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Solution

The third proportional to 447 and 690.66 is: 1,067.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    447 : 690.66 = 690.66 : x
  2. Step 2: Convert to fraction form
    447/690.66 = 690.66/x
  3. Step 3: Cross multiply
    447x = 690.66 × 690.66
  4. Step 4: Simplify right side
    447x = 477,006.06
  5. Step 5: Solve for x
    x = 477,006.06/447
  6. Step 6: Final answer
    x = 1,067.13

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.