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Finding the Fourth Proportional to 380.13, 524.54 and 255.75

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Solution

The fourth proportional to 380.13, 524.54 and 255.75 is: 352.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.13 : 524.54 = 255.75 : x
  2. Step 2: Convert to fraction form
    380.13/524.54 = 255.75/x
  3. Step 3: Cross multiply
    380.13x = 524.54 × 255.75
  4. Step 4: Simplify right side
    380.13x = 134,149.83
  5. Step 5: Solve for x
    x = 134,149.83/380.13
  6. Step 6: Final answer
    x = 352.91

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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.