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Finding the Fourth Proportional to 218.34, 326.72 and 127.12

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Solution

The fourth proportional to 218.34, 326.72 and 127.12 is: 190.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.34 : 326.72 = 127.12 : x
  2. Step 2: Convert to fraction form
    218.34/326.72 = 127.12/x
  3. Step 3: Cross multiply
    218.34x = 326.72 × 127.12
  4. Step 4: Simplify right side
    218.34x = 41,532.65
  5. Step 5: Solve for x
    x = 41,532.65/218.34
  6. Step 6: Final answer
    x = 190.22

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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.