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Finding the Fourth Proportional to 199.87, 273.70 and 188.77

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Solution

The fourth proportional to 199.87, 273.70 and 188.77 is: 258.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.87 : 273.70 = 188.77 : x
  2. Step 2: Convert to fraction form
    199.87/273.70 = 188.77/x
  3. Step 3: Cross multiply
    199.87x = 273.70 × 188.77
  4. Step 4: Simplify right side
    199.87x = 51,666.82
  5. Step 5: Solve for x
    x = 51,666.82/199.87
  6. Step 6: Final answer
    x = 258.50

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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.