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Finding the Third Proportional to 278.44 and 409.22

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Solution

The third proportional to 278.44 and 409.22 is: 601.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.44 : 409.22 = 409.22 : x
  2. Step 2: Convert to fraction form
    278.44/409.22 = 409.22/x
  3. Step 3: Cross multiply
    278.44x = 409.22 × 409.22
  4. Step 4: Simplify right side
    278.44x = 167,459.99
  5. Step 5: Solve for x
    x = 167,459.99/278.44
  6. Step 6: Final answer
    x = 601.43

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.