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Finding the Third Proportional to 356.91 and 779.31

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Solution

The third proportional to 356.91 and 779.31 is: 1,701.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.91 : 779.31 = 779.31 : x
  2. Step 2: Convert to fraction form
    356.91/779.31 = 779.31/x
  3. Step 3: Cross multiply
    356.91x = 779.31 × 779.31
  4. Step 4: Simplify right side
    356.91x = 607,321.88
  5. Step 5: Solve for x
    x = 607,321.88/356.91
  6. Step 6: Final answer
    x = 1,701.63

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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.