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Finding the Third Proportional to 303.75 and 431.25

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Solution

The third proportional to 303.75 and 431.25 is: 612.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.75 : 431.25 = 431.25 : x
  2. Step 2: Convert to fraction form
    303.75/431.25 = 431.25/x
  3. Step 3: Cross multiply
    303.75x = 431.25 × 431.25
  4. Step 4: Simplify right side
    303.75x = 185,976.56
  5. Step 5: Solve for x
    x = 185,976.56/303.75
  6. Step 6: Final answer
    x = 612.27

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.