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Finding the Fourth Proportional to 461.06, 636.21 and 274.61

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Solution

The fourth proportional to 461.06, 636.21 and 274.61 is: 378.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.06 : 636.21 = 274.61 : x
  2. Step 2: Convert to fraction form
    461.06/636.21 = 274.61/x
  3. Step 3: Cross multiply
    461.06x = 636.21 × 274.61
  4. Step 4: Simplify right side
    461.06x = 174,709.63
  5. Step 5: Solve for x
    x = 174,709.63/461.06
  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.