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Finding the Third Proportional to 619.50 and 908.25

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Solution

The third proportional to 619.50 and 908.25 is: 1,331.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.50 : 908.25 = 908.25 : x
  2. Step 2: Convert to fraction form
    619.50/908.25 = 908.25/x
  3. Step 3: Cross multiply
    619.50x = 908.25 × 908.25
  4. Step 4: Simplify right side
    619.50x = 824,918.06
  5. Step 5: Solve for x
    x = 824,918.06/619.50
  6. Step 6: Final answer
    x = 1,331.59

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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.