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Finding the Third Proportional to 405.94 and 835.88

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Solution

The third proportional to 405.94 and 835.88 is: 1,721.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.94 : 835.88 = 835.88 : x
  2. Step 2: Convert to fraction form
    405.94/835.88 = 835.88/x
  3. Step 3: Cross multiply
    405.94x = 835.88 × 835.88
  4. Step 4: Simplify right side
    405.94x = 698,687.02
  5. Step 5: Solve for x
    x = 698,687.02/405.94
  6. Step 6: Final answer
    x = 1,721.17

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.