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Finding the Fourth Proportional to 374.28, 516.38 and 216.88

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Solution

The fourth proportional to 374.28, 516.38 and 216.88 is: 299.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.28 : 516.38 = 216.88 : x
  2. Step 2: Convert to fraction form
    374.28/516.38 = 216.88/x
  3. Step 3: Cross multiply
    374.28x = 516.38 × 216.88
  4. Step 4: Simplify right side
    374.28x = 111,992.49
  5. Step 5: Solve for x
    x = 111,992.49/374.28
  6. Step 6: Final answer
    x = 299.22

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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.