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Finding the Fourth Proportional to 273.84, 378.18 and 208.50

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Solution

The fourth proportional to 273.84, 378.18 and 208.50 is: 287.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.84 : 378.18 = 208.50 : x
  2. Step 2: Convert to fraction form
    273.84/378.18 = 208.50/x
  3. Step 3: Cross multiply
    273.84x = 378.18 × 208.50
  4. Step 4: Simplify right side
    273.84x = 78,850.53
  5. Step 5: Solve for x
    x = 78,850.53/273.84
  6. Step 6: Final answer
    x = 287.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.