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Finding the Fourth Proportional to 358.34, 494.43 and 218.35

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Solution

The fourth proportional to 358.34, 494.43 and 218.35 is: 301.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.34 : 494.43 = 218.35 : x
  2. Step 2: Convert to fraction form
    358.34/494.43 = 218.35/x
  3. Step 3: Cross multiply
    358.34x = 494.43 × 218.35
  4. Step 4: Simplify right side
    358.34x = 107,956.32
  5. Step 5: Solve for x
    x = 107,956.32/358.34
  6. Step 6: Final answer
    x = 301.27

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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.