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Finding the Fourth Proportional to 403.50, 556.60 and 255.88

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Solution

The fourth proportional to 403.50, 556.60 and 255.88 is: 352.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.50 : 556.60 = 255.88 : x
  2. Step 2: Convert to fraction form
    403.50/556.60 = 255.88/x
  3. Step 3: Cross multiply
    403.50x = 556.60 × 255.88
  4. Step 4: Simplify right side
    403.50x = 142,422.81
  5. Step 5: Solve for x
    x = 142,422.81/403.50
  6. Step 6: Final answer
    x = 352.97

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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.