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Finding the Third Proportional to 152 and 220

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Solution

The third proportional to 152 and 220 is: 318.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    152 : 220 = 220 : x
  2. Step 2: Convert to fraction form
    152/220 = 220/x
  3. Step 3: Cross multiply
    152x = 220 × 220
  4. Step 4: Simplify right side
    152x = 48,400
  5. Step 5: Solve for x
    x = 48,400/152
  6. Step 6: Final answer
    x = 318.42

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.