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Finding the Fourth Proportional to 327.69, 451.71 and 275.40

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Solution

The fourth proportional to 327.69, 451.71 and 275.40 is: 379.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.69 : 451.71 = 275.40 : x
  2. Step 2: Convert to fraction form
    327.69/451.71 = 275.40/x
  3. Step 3: Cross multiply
    327.69x = 451.71 × 275.40
  4. Step 4: Simplify right side
    327.69x = 124,400.93
  5. Step 5: Solve for x
    x = 124,400.93/327.69
  6. Step 6: Final answer
    x = 379.63

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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.