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Finding the Fourth Proportional to 406.44, 609.66 and 325.79

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Solution

The fourth proportional to 406.44, 609.66 and 325.79 is: 488.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.44 : 609.66 = 325.79 : x
  2. Step 2: Convert to fraction form
    406.44/609.66 = 325.79/x
  3. Step 3: Cross multiply
    406.44x = 609.66 × 325.79
  4. Step 4: Simplify right side
    406.44x = 198,621.13
  5. Step 5: Solve for x
    x = 198,621.13/406.44
  6. Step 6: Final answer
    x = 488.69

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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.