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Finding the Fourth Proportional to 325.74, 446.51 and 321.36

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Solution

The fourth proportional to 325.74, 446.51 and 321.36 is: 440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.74 : 446.51 = 321.36 : x
  2. Step 2: Convert to fraction form
    325.74/446.51 = 321.36/x
  3. Step 3: Cross multiply
    325.74x = 446.51 × 321.36
  4. Step 4: Simplify right side
    325.74x = 143,489.75
  5. Step 5: Solve for x
    x = 143,489.75/325.74
  6. Step 6: Final answer
    x = 440.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.