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Finding the Third Proportional to 7.75 and 15.50

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Solution

The third proportional to 7.75 and 15.50 is: 31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.75 : 15.50 = 15.50 : x
  2. Step 2: Convert to fraction form
    7.75/15.50 = 15.50/x
  3. Step 3: Cross multiply
    7.75x = 15.50 × 15.50
  4. Step 4: Simplify right side
    7.75x = 240.25
  5. Step 5: Solve for x
    x = 240.25/7.75
  6. Step 6: Final answer
    x = 31

Related Problems

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.