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Finding the Fourth Proportional to 548.40, 756.76 and 327.28

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Solution

The fourth proportional to 548.40, 756.76 and 327.28 is: 451.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.40 : 756.76 = 327.28 : x
  2. Step 2: Convert to fraction form
    548.40/756.76 = 327.28/x
  3. Step 3: Cross multiply
    548.40x = 756.76 × 327.28
  4. Step 4: Simplify right side
    548.40x = 247,672.41
  5. Step 5: Solve for x
    x = 247,672.41/548.40
  6. Step 6: Final answer
    x = 451.63

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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.