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Finding the Fourth Proportional to 349.92, 524.32 and 212.80

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Solution

The fourth proportional to 349.92, 524.32 and 212.80 is: 318.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.92 : 524.32 = 212.80 : x
  2. Step 2: Convert to fraction form
    349.92/524.32 = 212.80/x
  3. Step 3: Cross multiply
    349.92x = 524.32 × 212.80
  4. Step 4: Simplify right side
    349.92x = 111,575.30
  5. Step 5: Solve for x
    x = 111,575.30/349.92
  6. Step 6: Final answer
    x = 318.86

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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.