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Finding the Fourth Proportional to 273.37, 409.92 and 99.91

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Solution

The fourth proportional to 273.37, 409.92 and 99.91 is: 149.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.37 : 409.92 = 99.91 : x
  2. Step 2: Convert to fraction form
    273.37/409.92 = 99.91/x
  3. Step 3: Cross multiply
    273.37x = 409.92 × 99.91
  4. Step 4: Simplify right side
    273.37x = 40,956.52
  5. Step 5: Solve for x
    x = 40,956.52/273.37
  6. Step 6: Final answer
    x = 149.82

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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.