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Finding the Fourth Proportional to 461.30, 636.37 and 274.68

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Solution

The fourth proportional to 461.30, 636.37 and 274.68 is: 378.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.30 : 636.37 = 274.68 : x
  2. Step 2: Convert to fraction form
    461.30/636.37 = 274.68/x
  3. Step 3: Cross multiply
    461.30x = 636.37 × 274.68
  4. Step 4: Simplify right side
    461.30x = 174,797.42
  5. Step 5: Solve for x
    x = 174,797.42/461.30
  6. Step 6: Final answer
    x = 378.93

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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.