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Finding the Fourth Proportional to 461.21, 636.48 and 328.68

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Solution

The fourth proportional to 461.21, 636.48 and 328.68 is: 453.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.21 : 636.48 = 328.68 : x
  2. Step 2: Convert to fraction form
    461.21/636.48 = 328.68/x
  3. Step 3: Cross multiply
    461.21x = 636.48 × 328.68
  4. Step 4: Simplify right side
    461.21x = 209,198.25
  5. Step 5: Solve for x
    x = 209,198.25/461.21
  6. Step 6: Final answer
    x = 453.59

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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.