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Finding the Fourth Proportional to 358.82, 495.18 and 218.93

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Solution

The fourth proportional to 358.82, 495.18 and 218.93 is: 302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.82 : 495.18 = 218.93 : x
  2. Step 2: Convert to fraction form
    358.82/495.18 = 218.93/x
  3. Step 3: Cross multiply
    358.82x = 495.18 × 218.93
  4. Step 4: Simplify right side
    358.82x = 108,409.76
  5. Step 5: Solve for x
    x = 108,409.76/358.82
  6. Step 6: Final answer
    x = 302.13

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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.