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Finding the Fourth Proportional to 654.86, 982.20 and 221.96

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Solution

The fourth proportional to 654.86, 982.20 and 221.96 is: 332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.86 : 982.20 = 221.96 : x
  2. Step 2: Convert to fraction form
    654.86/982.20 = 221.96/x
  3. Step 3: Cross multiply
    654.86x = 982.20 × 221.96
  4. Step 4: Simplify right side
    654.86x = 218,009.11
  5. Step 5: Solve for x
    x = 218,009.11/654.86
  6. Step 6: Final answer
    x = 332.91

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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.