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Finding the Fourth Proportional to 378.54, 521.58 and 273.24

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Solution

The fourth proportional to 378.54, 521.58 and 273.24 is: 376.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.54 : 521.58 = 273.24 : x
  2. Step 2: Convert to fraction form
    378.54/521.58 = 273.24/x
  3. Step 3: Cross multiply
    378.54x = 521.58 × 273.24
  4. Step 4: Simplify right side
    378.54x = 142,516.52
  5. Step 5: Solve for x
    x = 142,516.52/378.54
  6. Step 6: Final answer
    x = 376.49

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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.