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Finding the Third Proportional to 438.25 and 614.50

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Solution

The third proportional to 438.25 and 614.50 is: 861.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.25 : 614.50 = 614.50 : x
  2. Step 2: Convert to fraction form
    438.25/614.50 = 614.50/x
  3. Step 3: Cross multiply
    438.25x = 614.50 × 614.50
  4. Step 4: Simplify right side
    438.25x = 377,610.25
  5. Step 5: Solve for x
    x = 377,610.25/438.25
  6. Step 6: Final answer
    x = 861.63

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.