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Finding the Fourth Proportional to 349.81, 523.67 and 212.45

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Solution

The fourth proportional to 349.81, 523.67 and 212.45 is: 318.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.81 : 523.67 = 212.45 : x
  2. Step 2: Convert to fraction form
    349.81/523.67 = 212.45/x
  3. Step 3: Cross multiply
    349.81x = 523.67 × 212.45
  4. Step 4: Simplify right side
    349.81x = 111,250.01
  5. Step 5: Solve for x
    x = 111,250.01/349.81
  6. Step 6: Final answer
    x = 318.03

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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.