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Finding the Third Proportional to 4,389 and 4,830

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Solution

The third proportional to 4,389 and 4,830 is: 5,315.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,389 : 4,830 = 4,830 : x
  2. Step 2: Convert to fraction form
    4,389/4,830 = 4,830/x
  3. Step 3: Cross multiply
    4,389x = 4,830 × 4,830
  4. Step 4: Simplify right side
    4,389x = 23,328,900
  5. Step 5: Solve for x
    x = 23,328,900/4,389
  6. Step 6: Final answer
    x = 5,315.31

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These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.