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Finding the Third Proportional to 1,620.75 and 3,415.88

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Solution

The third proportional to 1,620.75 and 3,415.88 is: 7,199.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.75 : 3,415.88 = 3,415.88 : x
  2. Step 2: Convert to fraction form
    1,620.75/3,415.88 = 3,415.88/x
  3. Step 3: Cross multiply
    1,620.75x = 3,415.88 × 3,415.88
  4. Step 4: Simplify right side
    1,620.75x = 11,668,202.02
  5. Step 5: Solve for x
    x = 11,668,202.02/1,620.75
  6. Step 6: Final answer
    x = 7,199.26

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.