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Finding the Third Proportional to 415.76 and 918.37

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Solution

The third proportional to 415.76 and 918.37 is: 2,028.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.76 : 918.37 = 918.37 : x
  2. Step 2: Convert to fraction form
    415.76/918.37 = 918.37/x
  3. Step 3: Cross multiply
    415.76x = 918.37 × 918.37
  4. Step 4: Simplify right side
    415.76x = 843,401.88
  5. Step 5: Solve for x
    x = 843,401.88/415.76
  6. Step 6: Final answer
    x = 2,028.59

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.