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Finding the Third Proportional to 209.75 and 501.50

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Solution

The third proportional to 209.75 and 501.50 is: 1,199.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.75 : 501.50 = 501.50 : x
  2. Step 2: Convert to fraction form
    209.75/501.50 = 501.50/x
  3. Step 3: Cross multiply
    209.75x = 501.50 × 501.50
  4. Step 4: Simplify right side
    209.75x = 251,502.25
  5. Step 5: Solve for x
    x = 251,502.25/209.75
  6. Step 6: Final answer
    x = 1,199.06

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.