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Finding the Fourth Proportional to 358.30, 537.09 and 221.32

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Solution

The fourth proportional to 358.30, 537.09 and 221.32 is: 331.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.30 : 537.09 = 221.32 : x
  2. Step 2: Convert to fraction form
    358.30/537.09 = 221.32/x
  3. Step 3: Cross multiply
    358.30x = 537.09 × 221.32
  4. Step 4: Simplify right side
    358.30x = 118,868.76
  5. Step 5: Solve for x
    x = 118,868.76/358.30
  6. Step 6: Final answer
    x = 331.76

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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.