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Finding the Fourth Proportional to 264.36, 395.92 and 218.40

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Solution

The fourth proportional to 264.36, 395.92 and 218.40 is: 327.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.36 : 395.92 = 218.40 : x
  2. Step 2: Convert to fraction form
    264.36/395.92 = 218.40/x
  3. Step 3: Cross multiply
    264.36x = 395.92 × 218.40
  4. Step 4: Simplify right side
    264.36x = 86,468.93
  5. Step 5: Solve for x
    x = 86,468.93/264.36
  6. Step 6: Final answer
    x = 327.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.