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Finding the Third Proportional to 638.25 and 846.75

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Solution

The third proportional to 638.25 and 846.75 is: 1,123.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.25 : 846.75 = 846.75 : x
  2. Step 2: Convert to fraction form
    638.25/846.75 = 846.75/x
  3. Step 3: Cross multiply
    638.25x = 846.75 × 846.75
  4. Step 4: Simplify right side
    638.25x = 716,985.56
  5. Step 5: Solve for x
    x = 716,985.56/638.25
  6. Step 6: Final answer
    x = 1,123.36

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.