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Finding the Third Proportional to 1,920 and 4,440

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Solution

The third proportional to 1,920 and 4,440 is: 10,267.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920 : 4,440 = 4,440 : x
  2. Step 2: Convert to fraction form
    1,920/4,440 = 4,440/x
  3. Step 3: Cross multiply
    1,920x = 4,440 × 4,440
  4. Step 4: Simplify right side
    1,920x = 19,713,600
  5. Step 5: Solve for x
    x = 19,713,600/1,920
  6. Step 6: Final answer
    x = 10,267.50

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.