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Finding the Fourth Proportional to 238.95, 357.93 and 213.39

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Solution

The fourth proportional to 238.95, 357.93 and 213.39 is: 319.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.95 : 357.93 = 213.39 : x
  2. Step 2: Convert to fraction form
    238.95/357.93 = 213.39/x
  3. Step 3: Cross multiply
    238.95x = 357.93 × 213.39
  4. Step 4: Simplify right side
    238.95x = 76,378.68
  5. Step 5: Solve for x
    x = 76,378.68/238.95
  6. Step 6: Final answer
    x = 319.64

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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.