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Finding the Fourth Proportional to 332.10, 458.19 and 221.64

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Solution

The fourth proportional to 332.10, 458.19 and 221.64 is: 305.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.10 : 458.19 = 221.64 : x
  2. Step 2: Convert to fraction form
    332.10/458.19 = 221.64/x
  3. Step 3: Cross multiply
    332.10x = 458.19 × 221.64
  4. Step 4: Simplify right side
    332.10x = 101,553.23
  5. Step 5: Solve for x
    x = 101,553.23/332.10
  6. Step 6: Final answer
    x = 305.79

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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.