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Finding the Third Proportional to 268.78 and 562.31

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Solution

The third proportional to 268.78 and 562.31 is: 1,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.78 : 562.31 = 562.31 : x
  2. Step 2: Convert to fraction form
    268.78/562.31 = 562.31/x
  3. Step 3: Cross multiply
    268.78x = 562.31 × 562.31
  4. Step 4: Simplify right side
    268.78x = 316,195.35
  5. Step 5: Solve for x
    x = 316,195.35/268.78
  6. Step 6: Final answer
    x = 1,176.40

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.