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Finding the Third Proportional to 472.75 and 989.75

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Solution

The third proportional to 472.75 and 989.75 is: 2,072.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.75 : 989.75 = 989.75 : x
  2. Step 2: Convert to fraction form
    472.75/989.75 = 989.75/x
  3. Step 3: Cross multiply
    472.75x = 989.75 × 989.75
  4. Step 4: Simplify right side
    472.75x = 979,605.06
  5. Step 5: Solve for x
    x = 979,605.06/472.75
  6. Step 6: Final answer
    x = 2,072.14

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.