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Finding the Fourth Proportional to 358.34, 538.06 and 221.96

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Solution

The fourth proportional to 358.34, 538.06 and 221.96 is: 333.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.34 : 538.06 = 221.96 : x
  2. Step 2: Convert to fraction form
    358.34/538.06 = 221.96/x
  3. Step 3: Cross multiply
    358.34x = 538.06 × 221.96
  4. Step 4: Simplify right side
    358.34x = 119,427.80
  5. Step 5: Solve for x
    x = 119,427.80/358.34
  6. Step 6: Final answer
    x = 333.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.