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Finding the Fourth Proportional to 439.97, 606.96 and 274.14

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Solution

The fourth proportional to 439.97, 606.96 and 274.14 is: 378.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.97 : 606.96 = 274.14 : x
  2. Step 2: Convert to fraction form
    439.97/606.96 = 274.14/x
  3. Step 3: Cross multiply
    439.97x = 606.96 × 274.14
  4. Step 4: Simplify right side
    439.97x = 166,392.01
  5. Step 5: Solve for x
    x = 166,392.01/439.97
  6. Step 6: Final answer
    x = 378.19

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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.