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Finding the Fourth Proportional to 316.90, 473.06 and 273.84

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Solution

The fourth proportional to 316.90, 473.06 and 273.84 is: 408.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.90 : 473.06 = 273.84 : x
  2. Step 2: Convert to fraction form
    316.90/473.06 = 273.84/x
  3. Step 3: Cross multiply
    316.90x = 473.06 × 273.84
  4. Step 4: Simplify right side
    316.90x = 129,542.56
  5. Step 5: Solve for x
    x = 129,542.56/316.90
  6. Step 6: Final answer
    x = 408.78

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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.