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Finding the Third Proportional to 1,670 and 4,223

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Solution

The third proportional to 1,670 and 4,223 is: 10,678.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670 : 4,223 = 4,223 : x
  2. Step 2: Convert to fraction form
    1,670/4,223 = 4,223/x
  3. Step 3: Cross multiply
    1,670x = 4,223 × 4,223
  4. Step 4: Simplify right side
    1,670x = 17,833,729
  5. Step 5: Solve for x
    x = 17,833,729/1,670
  6. Step 6: Final answer
    x = 10,678.88

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Why These Related Problems?

These problems maintain the same ratio (2.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.