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Finding the Fourth Proportional to 380.24, 524.54 and 255.97

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Solution

The fourth proportional to 380.24, 524.54 and 255.97 is: 353.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.24 : 524.54 = 255.97 : x
  2. Step 2: Convert to fraction form
    380.24/524.54 = 255.97/x
  3. Step 3: Cross multiply
    380.24x = 524.54 × 255.97
  4. Step 4: Simplify right side
    380.24x = 134,263.88
  5. Step 5: Solve for x
    x = 134,263.88/380.24
  6. Step 6: Final answer
    x = 353.11

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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.