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Finding the Fourth Proportional to 272.07, 407.79 and 127.62

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Solution

The fourth proportional to 272.07, 407.79 and 127.62 is: 191.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.07 : 407.79 = 127.62 : x
  2. Step 2: Convert to fraction form
    272.07/407.79 = 127.62/x
  3. Step 3: Cross multiply
    272.07x = 407.79 × 127.62
  4. Step 4: Simplify right side
    272.07x = 52,042.16
  5. Step 5: Solve for x
    x = 52,042.16/272.07
  6. Step 6: Final answer
    x = 191.28

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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.