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Finding the Third Proportional to 382.50 and 505.69

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Solution

The third proportional to 382.50 and 505.69 is: 668.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.50 : 505.69 = 505.69 : x
  2. Step 2: Convert to fraction form
    382.50/505.69 = 505.69/x
  3. Step 3: Cross multiply
    382.50x = 505.69 × 505.69
  4. Step 4: Simplify right side
    382.50x = 255,719.85
  5. Step 5: Solve for x
    x = 255,719.85/382.50
  6. Step 6: Final answer
    x = 668.55

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.