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Finding the Fourth Proportional to 321.63, 479.69 and 273.19

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Solution

The fourth proportional to 321.63, 479.69 and 273.19 is: 407.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.63 : 479.69 = 273.19 : x
  2. Step 2: Convert to fraction form
    321.63/479.69 = 273.19/x
  3. Step 3: Cross multiply
    321.63x = 479.69 × 273.19
  4. Step 4: Simplify right side
    321.63x = 131,046.51
  5. Step 5: Solve for x
    x = 131,046.51/321.63
  6. Step 6: Final answer
    x = 407.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.