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Finding the Third Proportional to 155 and 324

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Solution

The third proportional to 155 and 324 is: 677.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    155 : 324 = 324 : x
  2. Step 2: Convert to fraction form
    155/324 = 324/x
  3. Step 3: Cross multiply
    155x = 324 × 324
  4. Step 4: Simplify right side
    155x = 104,976
  5. Step 5: Solve for x
    x = 104,976/155
  6. Step 6: Final answer
    x = 677.26

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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.