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Finding the Third Proportional to 3,309 and 4,842

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Solution

The third proportional to 3,309 and 4,842 is: 7,085.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,309 : 4,842 = 4,842 : x
  2. Step 2: Convert to fraction form
    3,309/4,842 = 4,842/x
  3. Step 3: Cross multiply
    3,309x = 4,842 × 4,842
  4. Step 4: Simplify right side
    3,309x = 23,444,964
  5. Step 5: Solve for x
    x = 23,444,964/3,309
  6. Step 6: Final answer
    x = 7,085.21

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.