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Finding the Fourth Proportional to 380.42, 524.85 and 233.09

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Solution

The fourth proportional to 380.42, 524.85 and 233.09 is: 321.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.42 : 524.85 = 233.09 : x
  2. Step 2: Convert to fraction form
    380.42/524.85 = 233.09/x
  3. Step 3: Cross multiply
    380.42x = 524.85 × 233.09
  4. Step 4: Simplify right side
    380.42x = 122,337.29
  5. Step 5: Solve for x
    x = 122,337.29/380.42
  6. Step 6: Final answer
    x = 321.58

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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.