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Finding the Fourth Proportional to 350.78, 525.49 and 213.41

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Solution

The fourth proportional to 350.78, 525.49 and 213.41 is: 319.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.78 : 525.49 = 213.41 : x
  2. Step 2: Convert to fraction form
    350.78/525.49 = 213.41/x
  3. Step 3: Cross multiply
    350.78x = 525.49 × 213.41
  4. Step 4: Simplify right side
    350.78x = 112,145.60
  5. Step 5: Solve for x
    x = 112,145.60/350.78
  6. Step 6: Final answer
    x = 319.71

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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.