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Finding the Fourth Proportional to 406.21, 609.04 and 197.86

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Solution

The fourth proportional to 406.21, 609.04 and 197.86 is: 296.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.21 : 609.04 = 197.86 : x
  2. Step 2: Convert to fraction form
    406.21/609.04 = 197.86/x
  3. Step 3: Cross multiply
    406.21x = 609.04 × 197.86
  4. Step 4: Simplify right side
    406.21x = 120,504.65
  5. Step 5: Solve for x
    x = 120,504.65/406.21
  6. Step 6: Final answer
    x = 296.66

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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.