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Finding the Fourth Proportional to 302.99, 453.78 and 221.63

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Solution

The fourth proportional to 302.99, 453.78 and 221.63 is: 331.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.99 : 453.78 = 221.63 : x
  2. Step 2: Convert to fraction form
    302.99/453.78 = 221.63/x
  3. Step 3: Cross multiply
    302.99x = 453.78 × 221.63
  4. Step 4: Simplify right side
    302.99x = 100,568.99
  5. Step 5: Solve for x
    x = 100,568.99/302.99
  6. Step 6: Final answer
    x = 331.93

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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.