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Finding the Fourth Proportional to 273.10, 409.68 and 99.73

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Solution

The fourth proportional to 273.10, 409.68 and 99.73 is: 149.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.10 : 409.68 = 99.73 : x
  2. Step 2: Convert to fraction form
    273.10/409.68 = 99.73/x
  3. Step 3: Cross multiply
    273.10x = 409.68 × 99.73
  4. Step 4: Simplify right side
    273.10x = 40,858.18
  5. Step 5: Solve for x
    x = 40,858.18/273.10
  6. Step 6: Final answer
    x = 149.61

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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.