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Finding the Third Proportional to 398.67 and 835.31

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Solution

The third proportional to 398.67 and 835.31 is: 1,750.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.67 : 835.31 = 835.31 : x
  2. Step 2: Convert to fraction form
    398.67/835.31 = 835.31/x
  3. Step 3: Cross multiply
    398.67x = 835.31 × 835.31
  4. Step 4: Simplify right side
    398.67x = 697,746.97
  5. Step 5: Solve for x
    x = 697,746.97/398.67
  6. Step 6: Final answer
    x = 1,750.18

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.