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Finding the Third Proportional to 1,938 and 4,165.50

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Solution

The third proportional to 1,938 and 4,165.50 is: 8,953.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938 : 4,165.50 = 4,165.50 : x
  2. Step 2: Convert to fraction form
    1,938/4,165.50 = 4,165.50/x
  3. Step 3: Cross multiply
    1,938x = 4,165.50 × 4,165.50
  4. Step 4: Simplify right side
    1,938x = 17,351,390.25
  5. Step 5: Solve for x
    x = 17,351,390.25/1,938
  6. Step 6: Final answer
    x = 8,953.25

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.