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Finding the Fourth Proportional to 358.25, 494.84 and 309.11

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Solution

The fourth proportional to 358.25, 494.84 and 309.11 is: 426.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.25 : 494.84 = 309.11 : x
  2. Step 2: Convert to fraction form
    358.25/494.84 = 309.11/x
  3. Step 3: Cross multiply
    358.25x = 494.84 × 309.11
  4. Step 4: Simplify right side
    358.25x = 152,958.29
  5. Step 5: Solve for x
    x = 152,958.29/358.25
  6. Step 6: Final answer
    x = 426.97

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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.