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Finding the Third Proportional to 200,400 and 310,725

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Solution

The third proportional to 200,400 and 310,725 is: 481,786.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,400 : 310,725 = 310,725 : x
  2. Step 2: Convert to fraction form
    200,400/310,725 = 310,725/x
  3. Step 3: Cross multiply
    200,400x = 310,725 × 310,725
  4. Step 4: Simplify right side
    200,400x = 96,550,025,625
  5. Step 5: Solve for x
    x = 96,550,025,625/200,400
  6. Step 6: Final answer
    x = 481,786.56

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.