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Finding the Third Proportional to 1,260 and 1,938

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Solution

The third proportional to 1,260 and 1,938 is: 2,980.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260 : 1,938 = 1,938 : x
  2. Step 2: Convert to fraction form
    1,260/1,938 = 1,938/x
  3. Step 3: Cross multiply
    1,260x = 1,938 × 1,938
  4. Step 4: Simplify right side
    1,260x = 3,755,844
  5. Step 5: Solve for x
    x = 3,755,844/1,260
  6. Step 6: Final answer
    x = 2,980.83

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.