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Finding the Third Proportional to 278 and 379.25

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Solution

The third proportional to 278 and 379.25 is: 517.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    278 : 379.25 = 379.25 : x
  2. Step 2: Convert to fraction form
    278/379.25 = 379.25/x
  3. Step 3: Cross multiply
    278x = 379.25 × 379.25
  4. Step 4: Simplify right side
    278x = 143,830.56
  5. Step 5: Solve for x
    x = 143,830.56/278
  6. Step 6: Final answer
    x = 517.38

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.