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Finding the Fourth Proportional to 199.32, 273.92 and 155.58

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Solution

The fourth proportional to 199.32, 273.92 and 155.58 is: 213.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.32 : 273.92 = 155.58 : x
  2. Step 2: Convert to fraction form
    199.32/273.92 = 155.58/x
  3. Step 3: Cross multiply
    199.32x = 273.92 × 155.58
  4. Step 4: Simplify right side
    199.32x = 42,616.47
  5. Step 5: Solve for x
    x = 42,616.47/199.32
  6. Step 6: Final answer
    x = 213.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.