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Finding the Fourth Proportional to 439.21, 659.04 and 336.43

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Solution

The fourth proportional to 439.21, 659.04 and 336.43 is: 504.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.21 : 659.04 = 336.43 : x
  2. Step 2: Convert to fraction form
    439.21/659.04 = 336.43/x
  3. Step 3: Cross multiply
    439.21x = 659.04 × 336.43
  4. Step 4: Simplify right side
    439.21x = 221,720.83
  5. Step 5: Solve for x
    x = 221,720.83/439.21
  6. Step 6: Final answer
    x = 504.82

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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.