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Finding the Fourth Proportional to 349.49, 523.96 and 212.50

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Solution

The fourth proportional to 349.49, 523.96 and 212.50 is: 318.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.49 : 523.96 = 212.50 : x
  2. Step 2: Convert to fraction form
    349.49/523.96 = 212.50/x
  3. Step 3: Cross multiply
    349.49x = 523.96 × 212.50
  4. Step 4: Simplify right side
    349.49x = 111,338.88
  5. Step 5: Solve for x
    x = 111,338.88/349.49
  6. Step 6: Final answer
    x = 318.58

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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.