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Finding the Fourth Proportional to 380.78, 525.36 and 233.30

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Solution

The fourth proportional to 380.78, 525.36 and 233.30 is: 321.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.78 : 525.36 = 233.30 : x
  2. Step 2: Convert to fraction form
    380.78/525.36 = 233.30/x
  3. Step 3: Cross multiply
    380.78x = 525.36 × 233.30
  4. Step 4: Simplify right side
    380.78x = 122,566.49
  5. Step 5: Solve for x
    x = 122,566.49/380.78
  6. Step 6: Final answer
    x = 321.88

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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.