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Finding the Third Proportional to 471.38 and 645.19

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Solution

The third proportional to 471.38 and 645.19 is: 883.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.38 : 645.19 = 645.19 : x
  2. Step 2: Convert to fraction form
    471.38/645.19 = 645.19/x
  3. Step 3: Cross multiply
    471.38x = 645.19 × 645.19
  4. Step 4: Simplify right side
    471.38x = 416,266.91
  5. Step 5: Solve for x
    x = 416,266.91/471.38
  6. Step 6: Final answer
    x = 883.09

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.