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Finding the Third Proportional to 280,110 and 423,500

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Solution

The third proportional to 280,110 and 423,500 is: 640,292.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,110 : 423,500 = 423,500 : x
  2. Step 2: Convert to fraction form
    280,110/423,500 = 423,500/x
  3. Step 3: Cross multiply
    280,110x = 423,500 × 423,500
  4. Step 4: Simplify right side
    280,110x = 179,352,250,000
  5. Step 5: Solve for x
    x = 179,352,250,000/280,110
  6. Step 6: Final answer
    x = 640,292.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.