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Finding the Fourth Proportional to 273.86, 378.12 and 215.09

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Solution

The fourth proportional to 273.86, 378.12 and 215.09 is: 296.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.86 : 378.12 = 215.09 : x
  2. Step 2: Convert to fraction form
    273.86/378.12 = 215.09/x
  3. Step 3: Cross multiply
    273.86x = 378.12 × 215.09
  4. Step 4: Simplify right side
    273.86x = 81,328.55
  5. Step 5: Solve for x
    x = 81,328.55/273.86
  6. Step 6: Final answer
    x = 296.97

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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.