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Finding the Fourth Proportional to 605.90, 835.57 and 357.23

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Solution

The fourth proportional to 605.90, 835.57 and 357.23 is: 492.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.90 : 835.57 = 357.23 : x
  2. Step 2: Convert to fraction form
    605.90/835.57 = 357.23/x
  3. Step 3: Cross multiply
    605.90x = 835.57 × 357.23
  4. Step 4: Simplify right side
    605.90x = 298,490.67
  5. Step 5: Solve for x
    x = 298,490.67/605.90
  6. Step 6: Final answer
    x = 492.64

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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.