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Finding the Fourth Proportional to 403.25, 556.44 and 255.92

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Solution

The fourth proportional to 403.25, 556.44 and 255.92 is: 353.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.25 : 556.44 = 255.92 : x
  2. Step 2: Convert to fraction form
    403.25/556.44 = 255.92/x
  3. Step 3: Cross multiply
    403.25x = 556.44 × 255.92
  4. Step 4: Simplify right side
    403.25x = 142,404.12
  5. Step 5: Solve for x
    x = 142,404.12/403.25
  6. Step 6: Final answer
    x = 353.14

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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.