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Finding the Fourth Proportional to 378.41, 521.46 and 273.30

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Solution

The fourth proportional to 378.41, 521.46 and 273.30 is: 376.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.41 : 521.46 = 273.30 : x
  2. Step 2: Convert to fraction form
    378.41/521.46 = 273.30/x
  3. Step 3: Cross multiply
    378.41x = 521.46 × 273.30
  4. Step 4: Simplify right side
    378.41x = 142,515.02
  5. Step 5: Solve for x
    x = 142,515.02/378.41
  6. Step 6: Final answer
    x = 376.62

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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.