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Finding the Third Proportional to 1,355 and 2,774

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Solution

The third proportional to 1,355 and 2,774 is: 5,679.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355 : 2,774 = 2,774 : x
  2. Step 2: Convert to fraction form
    1,355/2,774 = 2,774/x
  3. Step 3: Cross multiply
    1,355x = 2,774 × 2,774
  4. Step 4: Simplify right side
    1,355x = 7,695,076
  5. Step 5: Solve for x
    x = 7,695,076/1,355
  6. Step 6: Final answer
    x = 5,679.02

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.