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Finding the Fourth Proportional to 380.27, 524.48 and 287.03

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Solution

The fourth proportional to 380.27, 524.48 and 287.03 is: 395.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.27 : 524.48 = 287.03 : x
  2. Step 2: Convert to fraction form
    380.27/524.48 = 287.03/x
  3. Step 3: Cross multiply
    380.27x = 524.48 × 287.03
  4. Step 4: Simplify right side
    380.27x = 150,537.44
  5. Step 5: Solve for x
    x = 150,537.44/380.27
  6. Step 6: Final answer
    x = 395.88

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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.