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Finding the Fourth Proportional to 324.31, 485.67 and 303.81

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Solution

The fourth proportional to 324.31, 485.67 and 303.81 is: 454.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.31 : 485.67 = 303.81 : x
  2. Step 2: Convert to fraction form
    324.31/485.67 = 303.81/x
  3. Step 3: Cross multiply
    324.31x = 485.67 × 303.81
  4. Step 4: Simplify right side
    324.31x = 147,551.40
  5. Step 5: Solve for x
    x = 147,551.40/324.31
  6. Step 6: Final answer
    x = 454.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.