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Finding the Fourth Proportional to 332.12, 458.45 and 221.63

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Solution

The fourth proportional to 332.12, 458.45 and 221.63 is: 305.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.12 : 458.45 = 221.63 : x
  2. Step 2: Convert to fraction form
    332.12/458.45 = 221.63/x
  3. Step 3: Cross multiply
    332.12x = 458.45 × 221.63
  4. Step 4: Simplify right side
    332.12x = 101,602.87
  5. Step 5: Solve for x
    x = 101,602.87/332.12
  6. Step 6: Final answer
    x = 305.93

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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.