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Finding the Fourth Proportional to 358.23, 494.25 and 208.79

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Solution

The fourth proportional to 358.23, 494.25 and 208.79 is: 288.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.23 : 494.25 = 208.79 : x
  2. Step 2: Convert to fraction form
    358.23/494.25 = 208.79/x
  3. Step 3: Cross multiply
    358.23x = 494.25 × 208.79
  4. Step 4: Simplify right side
    358.23x = 103,191.99
  5. Step 5: Solve for x
    x = 103,191.99/358.23
  6. Step 6: Final answer
    x = 288.06

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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.