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Finding the Fourth Proportional to 272.71, 409.16 and 99.46

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Solution

The fourth proportional to 272.71, 409.16 and 99.46 is: 149.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.71 : 409.16 = 99.46 : x
  2. Step 2: Convert to fraction form
    272.71/409.16 = 99.46/x
  3. Step 3: Cross multiply
    272.71x = 409.16 × 99.46
  4. Step 4: Simplify right side
    272.71x = 40,694.56
  5. Step 5: Solve for x
    x = 40,694.56/272.71
  6. Step 6: Final answer
    x = 149.22

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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.