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Finding the Fourth Proportional to 308.45, 461.86 and 272

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Solution

The fourth proportional to 308.45, 461.86 and 272 is: 407.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.45 : 461.86 = 272 : x
  2. Step 2: Convert to fraction form
    308.45/461.86 = 272/x
  3. Step 3: Cross multiply
    308.45x = 461.86 × 272
  4. Step 4: Simplify right side
    308.45x = 125,625.92
  5. Step 5: Solve for x
    x = 125,625.92/308.45
  6. Step 6: Final answer
    x = 407.28

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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.