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Finding the Third Proportional to 4,221 and 4,860

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Solution

The third proportional to 4,221 and 4,860 is: 5,595.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,221 : 4,860 = 4,860 : x
  2. Step 2: Convert to fraction form
    4,221/4,860 = 4,860/x
  3. Step 3: Cross multiply
    4,221x = 4,860 × 4,860
  4. Step 4: Simplify right side
    4,221x = 23,619,600
  5. Step 5: Solve for x
    x = 23,619,600/4,221
  6. Step 6: Final answer
    x = 5,595.74

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.