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Finding the Fourth Proportional to 358.06, 494.03 and 218.15

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Solution

The fourth proportional to 358.06, 494.03 and 218.15 is: 300.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.06 : 494.03 = 218.15 : x
  2. Step 2: Convert to fraction form
    358.06/494.03 = 218.15/x
  3. Step 3: Cross multiply
    358.06x = 494.03 × 218.15
  4. Step 4: Simplify right side
    358.06x = 107,772.64
  5. Step 5: Solve for x
    x = 107,772.64/358.06
  6. Step 6: Final answer
    x = 300.99

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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.