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Finding the Third Proportional to 281,289.75 and 421,965

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Solution

The third proportional to 281,289.75 and 421,965 is: 632,993.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,289.75 : 421,965 = 421,965 : x
  2. Step 2: Convert to fraction form
    281,289.75/421,965 = 421,965/x
  3. Step 3: Cross multiply
    281,289.75x = 421,965 × 421,965
  4. Step 4: Simplify right side
    281,289.75x = 178,054,461,225
  5. Step 5: Solve for x
    x = 178,054,461,225/281,289.75
  6. Step 6: Final answer
    x = 632,993.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.