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Finding the Third Proportional to 155 and 222

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Solution

The third proportional to 155 and 222 is: 317.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    155 : 222 = 222 : x
  2. Step 2: Convert to fraction form
    155/222 = 222/x
  3. Step 3: Cross multiply
    155x = 222 × 222
  4. Step 4: Simplify right side
    155x = 49,284
  5. Step 5: Solve for x
    x = 49,284/155
  6. Step 6: Final answer
    x = 317.96

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.