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Finding the Third Proportional to 7.25 and 9.50

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Solution

The third proportional to 7.25 and 9.50 is: 12.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.25 : 9.50 = 9.50 : x
  2. Step 2: Convert to fraction form
    7.25/9.50 = 9.50/x
  3. Step 3: Cross multiply
    7.25x = 9.50 × 9.50
  4. Step 4: Simplify right side
    7.25x = 90.25
  5. Step 5: Solve for x
    x = 90.25/7.25
  6. Step 6: Final answer
    x = 12.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.