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Finding the Third Proportional to 438.38 and 606.75

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Solution

The third proportional to 438.38 and 606.75 is: 839.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.38 : 606.75 = 606.75 : x
  2. Step 2: Convert to fraction form
    438.38/606.75 = 606.75/x
  3. Step 3: Cross multiply
    438.38x = 606.75 × 606.75
  4. Step 4: Simplify right side
    438.38x = 368,145.56
  5. Step 5: Solve for x
    x = 368,145.56/438.38
  6. Step 6: Final answer
    x = 839.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.