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Finding the Third Proportional to 761.91 and 1,661.34

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Solution

The third proportional to 761.91 and 1,661.34 is: 3,622.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.91 : 1,661.34 = 1,661.34 : x
  2. Step 2: Convert to fraction form
    761.91/1,661.34 = 1,661.34/x
  3. Step 3: Cross multiply
    761.91x = 1,661.34 × 1,661.34
  4. Step 4: Simplify right side
    761.91x = 2,760,063.06
  5. Step 5: Solve for x
    x = 2,760,063.06/761.91
  6. Step 6: Final answer
    x = 3,622.58

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.