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Finding the Fourth Proportional to 301.66, 415.92 and 218.86

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Solution

The fourth proportional to 301.66, 415.92 and 218.86 is: 301.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.66 : 415.92 = 218.86 : x
  2. Step 2: Convert to fraction form
    301.66/415.92 = 218.86/x
  3. Step 3: Cross multiply
    301.66x = 415.92 × 218.86
  4. Step 4: Simplify right side
    301.66x = 91,028.25
  5. Step 5: Solve for x
    x = 91,028.25/301.66
  6. Step 6: Final answer
    x = 301.76

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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.