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Finding the Fourth Proportional to 461.19, 636.43 and 274.72

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Solution

The fourth proportional to 461.19, 636.43 and 274.72 is: 379.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.19 : 636.43 = 274.72 : x
  2. Step 2: Convert to fraction form
    461.19/636.43 = 274.72/x
  3. Step 3: Cross multiply
    461.19x = 636.43 × 274.72
  4. Step 4: Simplify right side
    461.19x = 174,840.05
  5. Step 5: Solve for x
    x = 174,840.05/461.19
  6. Step 6: Final answer
    x = 379.11

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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.