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Finding the Third Proportional to 207 and 419.72

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Solution

The third proportional to 207 and 419.72 is: 851.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    207 : 419.72 = 419.72 : x
  2. Step 2: Convert to fraction form
    207/419.72 = 419.72/x
  3. Step 3: Cross multiply
    207x = 419.72 × 419.72
  4. Step 4: Simplify right side
    207x = 176,163.83
  5. Step 5: Solve for x
    x = 176,163.83/207
  6. Step 6: Final answer
    x = 851.03

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.