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Finding the Third Proportional to 4 and 30

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Solution

The third proportional to 4 and 30 is: 225

Step by Step Solution

  1. Step 1: Write the proportion equation
    4 : 30 = 30 : x
  2. Step 2: Convert to fraction form
    4/30 = 30/x
  3. Step 3: Cross multiply
    4x = 30 × 30
  4. Step 4: Simplify right side
    4x = 900
  5. Step 5: Solve for x
    x = 900/4
  6. Step 6: Final answer
    x = 225

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Why These Related Problems?

These problems maintain the same ratio (7.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.