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Finding the Fourth Proportional to 421.89, 633.11 and 227.22

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Solution

The fourth proportional to 421.89, 633.11 and 227.22 is: 340.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.89 : 633.11 = 227.22 : x
  2. Step 2: Convert to fraction form
    421.89/633.11 = 227.22/x
  3. Step 3: Cross multiply
    421.89x = 633.11 × 227.22
  4. Step 4: Simplify right side
    421.89x = 143,854.12
  5. Step 5: Solve for x
    x = 143,854.12/421.89
  6. Step 6: Final answer
    x = 340.98

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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.