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Finding the Third Proportional to 212,880 and 320,206.50

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Solution

The third proportional to 212,880 and 320,206.50 is: 481,643.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,880 : 320,206.50 = 320,206.50 : x
  2. Step 2: Convert to fraction form
    212,880/320,206.50 = 320,206.50/x
  3. Step 3: Cross multiply
    212,880x = 320,206.50 × 320,206.50
  4. Step 4: Simplify right side
    212,880x = 102,532,202,642.25
  5. Step 5: Solve for x
    x = 102,532,202,642.25/212,880
  6. Step 6: Final answer
    x = 481,643.19

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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.