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Finding the Third Proportional to 381.50 and 528.25

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Solution

The third proportional to 381.50 and 528.25 is: 731.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.50 : 528.25 = 528.25 : x
  2. Step 2: Convert to fraction form
    381.50/528.25 = 528.25/x
  3. Step 3: Cross multiply
    381.50x = 528.25 × 528.25
  4. Step 4: Simplify right side
    381.50x = 279,048.06
  5. Step 5: Solve for x
    x = 279,048.06/381.50
  6. Step 6: Final answer
    x = 731.45

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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.