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Finding the Fourth Proportional to 358.47, 494.56 and 218.54

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Solution

The fourth proportional to 358.47, 494.56 and 218.54 is: 301.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.47 : 494.56 = 218.54 : x
  2. Step 2: Convert to fraction form
    358.47/494.56 = 218.54/x
  3. Step 3: Cross multiply
    358.47x = 494.56 × 218.54
  4. Step 4: Simplify right side
    358.47x = 108,081.14
  5. Step 5: Solve for x
    x = 108,081.14/358.47
  6. Step 6: Final answer
    x = 301.51

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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.