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Finding the Fourth Proportional to 380.42, 525.24 and 238.70

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Solution

The fourth proportional to 380.42, 525.24 and 238.70 is: 329.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.42 : 525.24 = 238.70 : x
  2. Step 2: Convert to fraction form
    380.42/525.24 = 238.70/x
  3. Step 3: Cross multiply
    380.42x = 525.24 × 238.70
  4. Step 4: Simplify right side
    380.42x = 125,374.79
  5. Step 5: Solve for x
    x = 125,374.79/380.42
  6. Step 6: Final answer
    x = 329.57

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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.