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Finding the Fourth Proportional to 439.56, 660.25 and 336.49

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Solution

The fourth proportional to 439.56, 660.25 and 336.49 is: 505.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.56 : 660.25 = 336.49 : x
  2. Step 2: Convert to fraction form
    439.56/660.25 = 336.49/x
  3. Step 3: Cross multiply
    439.56x = 660.25 × 336.49
  4. Step 4: Simplify right side
    439.56x = 222,166.29
  5. Step 5: Solve for x
    x = 222,166.29/439.56
  6. Step 6: Final answer
    x = 505.43

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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.