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Finding the Third Proportional to 280,634 and 421,271

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Solution

The third proportional to 280,634 and 421,271 is: 632,386.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,634 : 421,271 = 421,271 : x
  2. Step 2: Convert to fraction form
    280,634/421,271 = 421,271/x
  3. Step 3: Cross multiply
    280,634x = 421,271 × 421,271
  4. Step 4: Simplify right side
    280,634x = 177,469,255,441
  5. Step 5: Solve for x
    x = 177,469,255,441/280,634
  6. Step 6: Final answer
    x = 632,386.86

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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.