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Finding the Fourth Proportional to 399.06, 550.53 and 233.28

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Solution

The fourth proportional to 399.06, 550.53 and 233.28 is: 321.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.06 : 550.53 = 233.28 : x
  2. Step 2: Convert to fraction form
    399.06/550.53 = 233.28/x
  3. Step 3: Cross multiply
    399.06x = 550.53 × 233.28
  4. Step 4: Simplify right side
    399.06x = 128,427.64
  5. Step 5: Solve for x
    x = 128,427.64/399.06
  6. Step 6: Final answer
    x = 321.83

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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.