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Finding the Fourth Proportional to 406.97, 610.54 and 133.09

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Solution

The fourth proportional to 406.97, 610.54 and 133.09 is: 199.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.97 : 610.54 = 133.09 : x
  2. Step 2: Convert to fraction form
    406.97/610.54 = 133.09/x
  3. Step 3: Cross multiply
    406.97x = 610.54 × 133.09
  4. Step 4: Simplify right side
    406.97x = 81,258.34
  5. Step 5: Solve for x
    x = 81,258.34/406.97
  6. Step 6: Final answer
    x = 199.66

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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.