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Finding the Fourth Proportional to 303.48, 455.46 and 221.88

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Solution

The fourth proportional to 303.48, 455.46 and 221.88 is: 333.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.48 : 455.46 = 221.88 : x
  2. Step 2: Convert to fraction form
    303.48/455.46 = 221.88/x
  3. Step 3: Cross multiply
    303.48x = 455.46 × 221.88
  4. Step 4: Simplify right side
    303.48x = 101,057.46
  5. Step 5: Solve for x
    x = 101,057.46/303.48
  6. Step 6: Final answer
    x = 333.00

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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.