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Finding the Fourth Proportional to 358.47, 494.22 and 330.66

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Solution

The fourth proportional to 358.47, 494.22 and 330.66 is: 455.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.47 : 494.22 = 330.66 : x
  2. Step 2: Convert to fraction form
    358.47/494.22 = 330.66/x
  3. Step 3: Cross multiply
    358.47x = 494.22 × 330.66
  4. Step 4: Simplify right side
    358.47x = 163,418.79
  5. Step 5: Solve for x
    x = 163,418.79/358.47
  6. Step 6: Final answer
    x = 455.88

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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.