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Finding the Fourth Proportional to 378.27, 522.20 and 230.99

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Solution

The fourth proportional to 378.27, 522.20 and 230.99 is: 318.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.27 : 522.20 = 230.99 : x
  2. Step 2: Convert to fraction form
    378.27/522.20 = 230.99/x
  3. Step 3: Cross multiply
    378.27x = 522.20 × 230.99
  4. Step 4: Simplify right side
    378.27x = 120,619.65
  5. Step 5: Solve for x
    x = 120,619.65/378.27
  6. Step 6: Final answer
    x = 318.87

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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.