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Finding the Third Proportional to 618.75 and 1,334.75

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Solution

The third proportional to 618.75 and 1,334.75 is: 2,879.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.75 : 1,334.75 = 1,334.75 : x
  2. Step 2: Convert to fraction form
    618.75/1,334.75 = 1,334.75/x
  3. Step 3: Cross multiply
    618.75x = 1,334.75 × 1,334.75
  4. Step 4: Simplify right side
    618.75x = 1,781,557.56
  5. Step 5: Solve for x
    x = 1,781,557.56/618.75
  6. Step 6: Final answer
    x = 2,879.28

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.