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Finding the Fourth Proportional to 350.40, 521.82 and 329.45

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Solution

The fourth proportional to 350.40, 521.82 and 329.45 is: 490.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.40 : 521.82 = 329.45 : x
  2. Step 2: Convert to fraction form
    350.40/521.82 = 329.45/x
  3. Step 3: Cross multiply
    350.40x = 521.82 × 329.45
  4. Step 4: Simplify right side
    350.40x = 171,910.99
  5. Step 5: Solve for x
    x = 171,910.99/350.40
  6. Step 6: Final answer
    x = 490.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.