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Finding the Third Proportional to 4,230 and 4,689

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Solution

The third proportional to 4,230 and 4,689 is: 5,197.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,230 : 4,689 = 4,689 : x
  2. Step 2: Convert to fraction form
    4,230/4,689 = 4,689/x
  3. Step 3: Cross multiply
    4,230x = 4,689 × 4,689
  4. Step 4: Simplify right side
    4,230x = 21,986,721
  5. Step 5: Solve for x
    x = 21,986,721/4,230
  6. Step 6: Final answer
    x = 5,197.81

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.