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Finding the Third Proportional to 426.52 and 645.47

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Solution

The third proportional to 426.52 and 645.47 is: 976.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.52 : 645.47 = 645.47 : x
  2. Step 2: Convert to fraction form
    426.52/645.47 = 645.47/x
  3. Step 3: Cross multiply
    426.52x = 645.47 × 645.47
  4. Step 4: Simplify right side
    426.52x = 416,629.91
  5. Step 5: Solve for x
    x = 416,629.91/426.52
  6. Step 6: Final answer
    x = 976.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.