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Finding the Fourth Proportional to 395.56, 593.39 and 128.33

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Solution

The fourth proportional to 395.56, 593.39 and 128.33 is: 192.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.56 : 593.39 = 128.33 : x
  2. Step 2: Convert to fraction form
    395.56/593.39 = 128.33/x
  3. Step 3: Cross multiply
    395.56x = 593.39 × 128.33
  4. Step 4: Simplify right side
    395.56x = 76,146.77
  5. Step 5: Solve for x
    x = 76,146.77/395.56
  6. Step 6: Final answer
    x = 192.51

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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.