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Finding the Third Proportional to 438.25 and 584.50

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Solution

The third proportional to 438.25 and 584.50 is: 779.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.25 : 584.50 = 584.50 : x
  2. Step 2: Convert to fraction form
    438.25/584.50 = 584.50/x
  3. Step 3: Cross multiply
    438.25x = 584.50 × 584.50
  4. Step 4: Simplify right side
    438.25x = 341,640.25
  5. Step 5: Solve for x
    x = 341,640.25/438.25
  6. Step 6: Final answer
    x = 779.56

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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.