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Finding the Fourth Proportional to 358.20, 494.16 and 202.92

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Solution

The fourth proportional to 358.20, 494.16 and 202.92 is: 279.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.20 : 494.16 = 202.92 : x
  2. Step 2: Convert to fraction form
    358.20/494.16 = 202.92/x
  3. Step 3: Cross multiply
    358.20x = 494.16 × 202.92
  4. Step 4: Simplify right side
    358.20x = 100,274.95
  5. Step 5: Solve for x
    x = 100,274.95/358.20
  6. Step 6: Final answer
    x = 279.94

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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.