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Finding the Fourth Proportional to 358.43, 494.73 and 209.18

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Solution

The fourth proportional to 358.43, 494.73 and 209.18 is: 288.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.43 : 494.73 = 209.18 : x
  2. Step 2: Convert to fraction form
    358.43/494.73 = 209.18/x
  3. Step 3: Cross multiply
    358.43x = 494.73 × 209.18
  4. Step 4: Simplify right side
    358.43x = 103,486.22
  5. Step 5: Solve for x
    x = 103,486.22/358.43
  6. Step 6: Final answer
    x = 288.72

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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.