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Finding the Third Proportional to 781.75 and 1,707.75

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Solution

The third proportional to 781.75 and 1,707.75 is: 3,730.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    781.75 : 1,707.75 = 1,707.75 : x
  2. Step 2: Convert to fraction form
    781.75/1,707.75 = 1,707.75/x
  3. Step 3: Cross multiply
    781.75x = 1,707.75 × 1,707.75
  4. Step 4: Simplify right side
    781.75x = 2,916,410.06
  5. Step 5: Solve for x
    x = 2,916,410.06/781.75
  6. Step 6: Final answer
    x = 3,730.62

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.