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Finding the Fourth Proportional to 459.78, 634.31 and 273.20

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Solution

The fourth proportional to 459.78, 634.31 and 273.20 is: 376.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.78 : 634.31 = 273.20 : x
  2. Step 2: Convert to fraction form
    459.78/634.31 = 273.20/x
  3. Step 3: Cross multiply
    459.78x = 634.31 × 273.20
  4. Step 4: Simplify right side
    459.78x = 173,293.49
  5. Step 5: Solve for x
    x = 173,293.49/459.78
  6. Step 6: Final answer
    x = 376.91

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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.