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Finding the Fourth Proportional to 238.50, 357.86 and 218.00

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Solution

The fourth proportional to 238.50, 357.86 and 218.00 is: 327.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.50 : 357.86 = 218.00 : x
  2. Step 2: Convert to fraction form
    238.50/357.86 = 218.00/x
  3. Step 3: Cross multiply
    238.50x = 357.86 × 218.00
  4. Step 4: Simplify right side
    238.50x = 78,010.60
  5. Step 5: Solve for x
    x = 78,010.60/238.50
  6. Step 6: Final answer
    x = 327.09

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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.