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Finding the Fourth Proportional to 358.77, 495.15 and 218.93

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Solution

The fourth proportional to 358.77, 495.15 and 218.93 is: 302.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.77 : 495.15 = 218.93 : x
  2. Step 2: Convert to fraction form
    358.77/495.15 = 218.93/x
  3. Step 3: Cross multiply
    358.77x = 495.15 × 218.93
  4. Step 4: Simplify right side
    358.77x = 108,403.19
  5. Step 5: Solve for x
    x = 108,403.19/358.77
  6. Step 6: Final answer
    x = 302.15

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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.