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Finding the Third Proportional to 223.78 and 491.70

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Solution

The third proportional to 223.78 and 491.70 is: 1,080.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.78 : 491.70 = 491.70 : x
  2. Step 2: Convert to fraction form
    223.78/491.70 = 491.70/x
  3. Step 3: Cross multiply
    223.78x = 491.70 × 491.70
  4. Step 4: Simplify right side
    223.78x = 241,764.28
  5. Step 5: Solve for x
    x = 241,764.28/223.78
  6. Step 6: Final answer
    x = 1,080.37

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.