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Finding the Fourth Proportional to 316.82, 471.90 and 300.36

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Solution

The fourth proportional to 316.82, 471.90 and 300.36 is: 447.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.82 : 471.90 = 300.36 : x
  2. Step 2: Convert to fraction form
    316.82/471.90 = 300.36/x
  3. Step 3: Cross multiply
    316.82x = 471.90 × 300.36
  4. Step 4: Simplify right side
    316.82x = 141,739.88
  5. Step 5: Solve for x
    x = 141,739.88/316.82
  6. Step 6: Final answer
    x = 447.38

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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.