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Finding the Third Proportional to 1,964 and 3,985

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Solution

The third proportional to 1,964 and 3,985 is: 8,085.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964 : 3,985 = 3,985 : x
  2. Step 2: Convert to fraction form
    1,964/3,985 = 3,985/x
  3. Step 3: Cross multiply
    1,964x = 3,985 × 3,985
  4. Step 4: Simplify right side
    1,964x = 15,880,225
  5. Step 5: Solve for x
    x = 15,880,225/1,964
  6. Step 6: Final answer
    x = 8,085.65

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.