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Finding the Third Proportional to 1,958 and 4,238

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Solution

The third proportional to 1,958 and 4,238 is: 9,172.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958 : 4,238 = 4,238 : x
  2. Step 2: Convert to fraction form
    1,958/4,238 = 4,238/x
  3. Step 3: Cross multiply
    1,958x = 4,238 × 4,238
  4. Step 4: Simplify right side
    1,958x = 17,960,644
  5. Step 5: Solve for x
    x = 17,960,644/1,958
  6. Step 6: Final answer
    x = 9,172.95

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.