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Finding the Fourth Proportional to 357.78, 536.40 and 255.27

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Solution

The fourth proportional to 357.78, 536.40 and 255.27 is: 382.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.78 : 536.40 = 255.27 : x
  2. Step 2: Convert to fraction form
    357.78/536.40 = 255.27/x
  3. Step 3: Cross multiply
    357.78x = 536.40 × 255.27
  4. Step 4: Simplify right side
    357.78x = 136,926.83
  5. Step 5: Solve for x
    x = 136,926.83/357.78
  6. Step 6: Final answer
    x = 382.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.