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Finding the Fourth Proportional to 272.02, 407.62 and 127.43

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Solution

The fourth proportional to 272.02, 407.62 and 127.43 is: 190.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.02 : 407.62 = 127.43 : x
  2. Step 2: Convert to fraction form
    272.02/407.62 = 127.43/x
  3. Step 3: Cross multiply
    272.02x = 407.62 × 127.43
  4. Step 4: Simplify right side
    272.02x = 51,943.02
  5. Step 5: Solve for x
    x = 51,943.02/272.02
  6. Step 6: Final answer
    x = 190.95

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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.