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Finding the Fourth Proportional to 605.79, 835.97 and 357.11

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Solution

The fourth proportional to 605.79, 835.97 and 357.11 is: 492.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.79 : 835.97 = 357.11 : x
  2. Step 2: Convert to fraction form
    605.79/835.97 = 357.11/x
  3. Step 3: Cross multiply
    605.79x = 835.97 × 357.11
  4. Step 4: Simplify right side
    605.79x = 298,529.07
  5. Step 5: Solve for x
    x = 298,529.07/605.79
  6. Step 6: Final answer
    x = 492.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.