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Finding the Fourth Proportional to 381.36, 525.08 and 325.25

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Solution

The fourth proportional to 381.36, 525.08 and 325.25 is: 447.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.36 : 525.08 = 325.25 : x
  2. Step 2: Convert to fraction form
    381.36/525.08 = 325.25/x
  3. Step 3: Cross multiply
    381.36x = 525.08 × 325.25
  4. Step 4: Simplify right side
    381.36x = 170,778.02
  5. Step 5: Solve for x
    x = 170,778.02/381.36
  6. Step 6: Final answer
    x = 447.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.