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Finding the Fourth Proportional to 404.58, 606.49 and 221.72

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Solution

The fourth proportional to 404.58, 606.49 and 221.72 is: 332.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.58 : 606.49 = 221.72 : x
  2. Step 2: Convert to fraction form
    404.58/606.49 = 221.72/x
  3. Step 3: Cross multiply
    404.58x = 606.49 × 221.72
  4. Step 4: Simplify right side
    404.58x = 134,471.92
  5. Step 5: Solve for x
    x = 134,471.92/404.58
  6. Step 6: Final answer
    x = 332.37

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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.