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Finding the Fourth Proportional to 308.58, 461.66 and 272.13

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Solution

The fourth proportional to 308.58, 461.66 and 272.13 is: 407.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.58 : 461.66 = 272.13 : x
  2. Step 2: Convert to fraction form
    308.58/461.66 = 272.13/x
  3. Step 3: Cross multiply
    308.58x = 461.66 × 272.13
  4. Step 4: Simplify right side
    308.58x = 125,630.18
  5. Step 5: Solve for x
    x = 125,630.18/308.58
  6. Step 6: Final answer
    x = 407.12

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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.