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Finding the Fourth Proportional to 398.99, 550.60 and 233.26

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Solution

The fourth proportional to 398.99, 550.60 and 233.26 is: 321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.99 : 550.60 = 233.26 : x
  2. Step 2: Convert to fraction form
    398.99/550.60 = 233.26/x
  3. Step 3: Cross multiply
    398.99x = 550.60 × 233.26
  4. Step 4: Simplify right side
    398.99x = 128,434.09
  5. Step 5: Solve for x
    x = 128,434.09/398.99
  6. Step 6: Final answer
    x = 321.90

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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.