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Finding the Fourth Proportional to 358.10, 493.97 and 220.10

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Solution

The fourth proportional to 358.10, 493.97 and 220.10 is: 303.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.10 : 493.97 = 220.10 : x
  2. Step 2: Convert to fraction form
    358.10/493.97 = 220.10/x
  3. Step 3: Cross multiply
    358.10x = 493.97 × 220.10
  4. Step 4: Simplify right side
    358.10x = 108,722.80
  5. Step 5: Solve for x
    x = 108,722.80/358.10
  6. Step 6: Final answer
    x = 303.61

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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.