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Finding the Third Proportional to 644.25 and 948

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Solution

The third proportional to 644.25 and 948 is: 1,394.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.25 : 948 = 948 : x
  2. Step 2: Convert to fraction form
    644.25/948 = 948/x
  3. Step 3: Cross multiply
    644.25x = 948 × 948
  4. Step 4: Simplify right side
    644.25x = 898,704
  5. Step 5: Solve for x
    x = 898,704/644.25
  6. Step 6: Final answer
    x = 1,394.96

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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.