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Finding the Fourth Proportional to 364.20, 546.21 and 217.86

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Solution

The fourth proportional to 364.20, 546.21 and 217.86 is: 326.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.20 : 546.21 = 217.86 : x
  2. Step 2: Convert to fraction form
    364.20/546.21 = 217.86/x
  3. Step 3: Cross multiply
    364.20x = 546.21 × 217.86
  4. Step 4: Simplify right side
    364.20x = 118,997.31
  5. Step 5: Solve for x
    x = 118,997.31/364.20
  6. Step 6: Final answer
    x = 326.74

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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.