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Finding the Third Proportional to 356.06 and 781.31

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Solution

The third proportional to 356.06 and 781.31 is: 1,714.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.06 : 781.31 = 781.31 : x
  2. Step 2: Convert to fraction form
    356.06/781.31 = 781.31/x
  3. Step 3: Cross multiply
    356.06x = 781.31 × 781.31
  4. Step 4: Simplify right side
    356.06x = 610,449.22
  5. Step 5: Solve for x
    x = 610,449.22/356.06
  6. Step 6: Final answer
    x = 1,714.44

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.