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Finding the Fourth Proportional to 605.50, 835.48 and 356.90

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Solution

The fourth proportional to 605.50, 835.48 and 356.90 is: 492.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.50 : 835.48 = 356.90 : x
  2. Step 2: Convert to fraction form
    605.50/835.48 = 356.90/x
  3. Step 3: Cross multiply
    605.50x = 835.48 × 356.90
  4. Step 4: Simplify right side
    605.50x = 298,183.78
  5. Step 5: Solve for x
    x = 298,183.78/605.50
  6. Step 6: Final answer
    x = 492.46

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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.