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Finding the Fourth Proportional to 603.99, 834.60 and 485.73

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Solution

The fourth proportional to 603.99, 834.60 and 485.73 is: 671.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.99 : 834.60 = 485.73 : x
  2. Step 2: Convert to fraction form
    603.99/834.60 = 485.73/x
  3. Step 3: Cross multiply
    603.99x = 834.60 × 485.73
  4. Step 4: Simplify right side
    603.99x = 405,392.08
  5. Step 5: Solve for x
    x = 405,392.08/603.99
  6. Step 6: Final answer
    x = 671.19

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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.