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Finding the Fourth Proportional to 358.19, 491.08 and 351.71

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Solution

The fourth proportional to 358.19, 491.08 and 351.71 is: 482.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.19 : 491.08 = 351.71 : x
  2. Step 2: Convert to fraction form
    358.19/491.08 = 351.71/x
  3. Step 3: Cross multiply
    358.19x = 491.08 × 351.71
  4. Step 4: Simplify right side
    358.19x = 172,713.97
  5. Step 5: Solve for x
    x = 172,713.97/358.19
  6. Step 6: Final answer
    x = 482.19

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.