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Finding the Fourth Proportional to 324.11, 485.53 and 259.25

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Solution

The fourth proportional to 324.11, 485.53 and 259.25 is: 388.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.11 : 485.53 = 259.25 : x
  2. Step 2: Convert to fraction form
    324.11/485.53 = 259.25/x
  3. Step 3: Cross multiply
    324.11x = 485.53 × 259.25
  4. Step 4: Simplify right side
    324.11x = 125,873.65
  5. Step 5: Solve for x
    x = 125,873.65/324.11
  6. Step 6: Final answer
    x = 388.37

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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.