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Finding the Third Proportional to 174 and 421.50

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Solution

The third proportional to 174 and 421.50 is: 1,021.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    174 : 421.50 = 421.50 : x
  2. Step 2: Convert to fraction form
    174/421.50 = 421.50/x
  3. Step 3: Cross multiply
    174x = 421.50 × 421.50
  4. Step 4: Simplify right side
    174x = 177,662.25
  5. Step 5: Solve for x
    x = 177,662.25/174
  6. Step 6: Final answer
    x = 1,021.05

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.