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Finding the Third Proportional to 618.75 and 903.38

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Solution

The third proportional to 618.75 and 903.38 is: 1,318.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.75 : 903.38 = 903.38 : x
  2. Step 2: Convert to fraction form
    618.75/903.38 = 903.38/x
  3. Step 3: Cross multiply
    618.75x = 903.38 × 903.38
  4. Step 4: Simplify right side
    618.75x = 816,086.39
  5. Step 5: Solve for x
    x = 816,086.39/618.75
  6. Step 6: Final answer
    x = 1,318.93

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.