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Finding the Third Proportional to 31.25 and 35

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Solution

The third proportional to 31.25 and 35 is: 39.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.25 : 35 = 35 : x
  2. Step 2: Convert to fraction form
    31.25/35 = 35/x
  3. Step 3: Cross multiply
    31.25x = 35 × 35
  4. Step 4: Simplify right side
    31.25x = 1,225
  5. Step 5: Solve for x
    x = 1,225/31.25
  6. Step 6: Final answer
    x = 39.20

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.