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Finding the Fourth Proportional to 406.41, 609.54 and 380.89

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Solution

The fourth proportional to 406.41, 609.54 and 380.89 is: 571.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.41 : 609.54 = 380.89 : x
  2. Step 2: Convert to fraction form
    406.41/609.54 = 380.89/x
  3. Step 3: Cross multiply
    406.41x = 609.54 × 380.89
  4. Step 4: Simplify right side
    406.41x = 232,167.69
  5. Step 5: Solve for x
    x = 232,167.69/406.41
  6. Step 6: Final answer
    x = 571.26

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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.