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Finding the Third Proportional to 817.25 and 1,210

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Solution

The third proportional to 817.25 and 1,210 is: 1,791.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.25 : 1,210 = 1,210 : x
  2. Step 2: Convert to fraction form
    817.25/1,210 = 1,210/x
  3. Step 3: Cross multiply
    817.25x = 1,210 × 1,210
  4. Step 4: Simplify right side
    817.25x = 1,464,100
  5. Step 5: Solve for x
    x = 1,464,100/817.25
  6. Step 6: Final answer
    x = 1,791.50

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.