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Finding the Fourth Proportional to 264.24, 395.64 and 218.79

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Solution

The fourth proportional to 264.24, 395.64 and 218.79 is: 327.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.24 : 395.64 = 218.79 : x
  2. Step 2: Convert to fraction form
    264.24/395.64 = 218.79/x
  3. Step 3: Cross multiply
    264.24x = 395.64 × 218.79
  4. Step 4: Simplify right side
    264.24x = 86,562.08
  5. Step 5: Solve for x
    x = 86,562.08/264.24
  6. Step 6: Final answer
    x = 327.59

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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.