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Finding the Fourth Proportional to 374.20, 516.26 and 216.79

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Solution

The fourth proportional to 374.20, 516.26 and 216.79 is: 299.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.20 : 516.26 = 216.79 : x
  2. Step 2: Convert to fraction form
    374.20/516.26 = 216.79/x
  3. Step 3: Cross multiply
    374.20x = 516.26 × 216.79
  4. Step 4: Simplify right side
    374.20x = 111,917.42
  5. Step 5: Solve for x
    x = 111,917.42/374.20
  6. Step 6: Final answer
    x = 299.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.