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Finding the Third Proportional to 180,880 and 280,360

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Solution

The third proportional to 180,880 and 280,360 is: 434,551.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,880 : 280,360 = 280,360 : x
  2. Step 2: Convert to fraction form
    180,880/280,360 = 280,360/x
  3. Step 3: Cross multiply
    180,880x = 280,360 × 280,360
  4. Step 4: Simplify right side
    180,880x = 78,601,729,600
  5. Step 5: Solve for x
    x = 78,601,729,600/180,880
  6. Step 6: Final answer
    x = 434,551.80

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.