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Finding the Fourth Proportional to 406.67, 608.90 and 329.45

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Solution

The fourth proportional to 406.67, 608.90 and 329.45 is: 493.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.67 : 608.90 = 329.45 : x
  2. Step 2: Convert to fraction form
    406.67/608.90 = 329.45/x
  3. Step 3: Cross multiply
    406.67x = 608.90 × 329.45
  4. Step 4: Simplify right side
    406.67x = 200,597.41
  5. Step 5: Solve for x
    x = 200,597.41/406.67
  6. Step 6: Final answer
    x = 493.27

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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.