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Finding the Fourth Proportional to 358.52, 494.59 and 318.63

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Solution

The fourth proportional to 358.52, 494.59 and 318.63 is: 439.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.52 : 494.59 = 318.63 : x
  2. Step 2: Convert to fraction form
    358.52/494.59 = 318.63/x
  3. Step 3: Cross multiply
    358.52x = 494.59 × 318.63
  4. Step 4: Simplify right side
    358.52x = 157,589.62
  5. Step 5: Solve for x
    x = 157,589.62/358.52
  6. Step 6: Final answer
    x = 439.56

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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.