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Finding the Third Proportional to 813.75 and 1,781.75

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Solution

The third proportional to 813.75 and 1,781.75 is: 3,901.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.75 : 1,781.75 = 1,781.75 : x
  2. Step 2: Convert to fraction form
    813.75/1,781.75 = 1,781.75/x
  3. Step 3: Cross multiply
    813.75x = 1,781.75 × 1,781.75
  4. Step 4: Simplify right side
    813.75x = 3,174,633.06
  5. Step 5: Solve for x
    x = 3,174,633.06/813.75
  6. Step 6: Final answer
    x = 3,901.24

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.