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Finding the Third Proportional to 312.50 and 484.75

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Solution

The third proportional to 312.50 and 484.75 is: 751.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.50 : 484.75 = 484.75 : x
  2. Step 2: Convert to fraction form
    312.50/484.75 = 484.75/x
  3. Step 3: Cross multiply
    312.50x = 484.75 × 484.75
  4. Step 4: Simplify right side
    312.50x = 234,982.56
  5. Step 5: Solve for x
    x = 234,982.56/312.50
  6. Step 6: Final answer
    x = 751.94

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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.