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Finding the Fourth Proportional to 406.82, 561.03 and 274.34

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Solution

The fourth proportional to 406.82, 561.03 and 274.34 is: 378.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.82 : 561.03 = 274.34 : x
  2. Step 2: Convert to fraction form
    406.82/561.03 = 274.34/x
  3. Step 3: Cross multiply
    406.82x = 561.03 × 274.34
  4. Step 4: Simplify right side
    406.82x = 153,912.97
  5. Step 5: Solve for x
    x = 153,912.97/406.82
  6. Step 6: Final answer
    x = 378.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.