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Finding the Fourth Proportional to 218.54, 301.50 and 131.22

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Solution

The fourth proportional to 218.54, 301.50 and 131.22 is: 181.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.54 : 301.50 = 131.22 : x
  2. Step 2: Convert to fraction form
    218.54/301.50 = 131.22/x
  3. Step 3: Cross multiply
    218.54x = 301.50 × 131.22
  4. Step 4: Simplify right side
    218.54x = 39,562.83
  5. Step 5: Solve for x
    x = 39,562.83/218.54
  6. Step 6: Final answer
    x = 181.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.