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Finding the Fourth Proportional to 403.33, 556.66 and 255.98

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Solution

The fourth proportional to 403.33, 556.66 and 255.98 is: 353.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.33 : 556.66 = 255.98 : x
  2. Step 2: Convert to fraction form
    403.33/556.66 = 255.98/x
  3. Step 3: Cross multiply
    403.33x = 556.66 × 255.98
  4. Step 4: Simplify right side
    403.33x = 142,493.83
  5. Step 5: Solve for x
    x = 142,493.83/403.33
  6. Step 6: Final answer
    x = 353.29

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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.