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Finding the Fourth Proportional to 285.80, 394.05 and 233.29

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Solution

The fourth proportional to 285.80, 394.05 and 233.29 is: 321.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.80 : 394.05 = 233.29 : x
  2. Step 2: Convert to fraction form
    285.80/394.05 = 233.29/x
  3. Step 3: Cross multiply
    285.80x = 394.05 × 233.29
  4. Step 4: Simplify right side
    285.80x = 91,928.33
  5. Step 5: Solve for x
    x = 91,928.33/285.80
  6. Step 6: Final answer
    x = 321.65

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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.