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Finding the Fourth Proportional to 404.50, 606.20 and 221.98

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Solution

The fourth proportional to 404.50, 606.20 and 221.98 is: 332.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.50 : 606.20 = 221.98 : x
  2. Step 2: Convert to fraction form
    404.50/606.20 = 221.98/x
  3. Step 3: Cross multiply
    404.50x = 606.20 × 221.98
  4. Step 4: Simplify right side
    404.50x = 134,564.28
  5. Step 5: Solve for x
    x = 134,564.28/404.50
  6. Step 6: Final answer
    x = 332.67

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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.