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Finding the Fourth Proportional to 381.22, 525.90 and 233.86

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Solution

The fourth proportional to 381.22, 525.90 and 233.86 is: 322.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.22 : 525.90 = 233.86 : x
  2. Step 2: Convert to fraction form
    381.22/525.90 = 233.86/x
  3. Step 3: Cross multiply
    381.22x = 525.90 × 233.86
  4. Step 4: Simplify right side
    381.22x = 122,986.97
  5. Step 5: Solve for x
    x = 122,986.97/381.22
  6. Step 6: Final answer
    x = 322.61

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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.