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Finding the Fourth Proportional to 272.97, 409.27 and 90.34

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Solution

The fourth proportional to 272.97, 409.27 and 90.34 is: 135.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.97 : 409.27 = 90.34 : x
  2. Step 2: Convert to fraction form
    272.97/409.27 = 90.34/x
  3. Step 3: Cross multiply
    272.97x = 409.27 × 90.34
  4. Step 4: Simplify right side
    272.97x = 36,970.95
  5. Step 5: Solve for x
    x = 36,970.95/272.97
  6. Step 6: Final answer
    x = 135.44

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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.