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Finding the Third Proportional to 2,185 and 4,640

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Solution

The third proportional to 2,185 and 4,640 is: 9,853.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185 : 4,640 = 4,640 : x
  2. Step 2: Convert to fraction form
    2,185/4,640 = 4,640/x
  3. Step 3: Cross multiply
    2,185x = 4,640 × 4,640
  4. Step 4: Simplify right side
    2,185x = 21,529,600
  5. Step 5: Solve for x
    x = 21,529,600/2,185
  6. Step 6: Final answer
    x = 9,853.36

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.