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Finding the Third Proportional to 4,221 and 4,911

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Solution

The third proportional to 4,221 and 4,911 is: 5,713.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,221 : 4,911 = 4,911 : x
  2. Step 2: Convert to fraction form
    4,221/4,911 = 4,911/x
  3. Step 3: Cross multiply
    4,221x = 4,911 × 4,911
  4. Step 4: Simplify right side
    4,221x = 24,117,921
  5. Step 5: Solve for x
    x = 24,117,921/4,221
  6. Step 6: Final answer
    x = 5,713.79

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.