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Finding the Third Proportional to 906.75 and 988.75

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Solution

The third proportional to 906.75 and 988.75 is: 1,078.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.75 : 988.75 = 988.75 : x
  2. Step 2: Convert to fraction form
    906.75/988.75 = 988.75/x
  3. Step 3: Cross multiply
    906.75x = 988.75 × 988.75
  4. Step 4: Simplify right side
    906.75x = 977,626.56
  5. Step 5: Solve for x
    x = 977,626.56/906.75
  6. Step 6: Final answer
    x = 1,078.17

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.