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Finding the Fourth Proportional to 439.19, 659.69 and 336.11

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Solution

The fourth proportional to 439.19, 659.69 and 336.11 is: 504.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.19 : 659.69 = 336.11 : x
  2. Step 2: Convert to fraction form
    439.19/659.69 = 336.11/x
  3. Step 3: Cross multiply
    439.19x = 659.69 × 336.11
  4. Step 4: Simplify right side
    439.19x = 221,730.90
  5. Step 5: Solve for x
    x = 221,730.90/439.19
  6. Step 6: Final answer
    x = 504.87

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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.