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Finding the Third Proportional to 661.22 and 1,436.63

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Solution

The third proportional to 661.22 and 1,436.63 is: 3,121.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.22 : 1,436.63 = 1,436.63 : x
  2. Step 2: Convert to fraction form
    661.22/1,436.63 = 1,436.63/x
  3. Step 3: Cross multiply
    661.22x = 1,436.63 × 1,436.63
  4. Step 4: Simplify right side
    661.22x = 2,063,891.39
  5. Step 5: Solve for x
    x = 2,063,891.39/661.22
  6. Step 6: Final answer
    x = 3,121.34

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.