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Finding the Third Proportional to 3,210.75 and 4,279.50

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Solution

The third proportional to 3,210.75 and 4,279.50 is: 5,704.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210.75 : 4,279.50 = 4,279.50 : x
  2. Step 2: Convert to fraction form
    3,210.75/4,279.50 = 4,279.50/x
  3. Step 3: Cross multiply
    3,210.75x = 4,279.50 × 4,279.50
  4. Step 4: Simplify right side
    3,210.75x = 18,314,120.25
  5. Step 5: Solve for x
    x = 18,314,120.25/3,210.75
  6. Step 6: Final answer
    x = 5,704.00

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.