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Finding the Fourth Proportional to 548.28, 756.63 and 338.58

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Solution

The fourth proportional to 548.28, 756.63 and 338.58 is: 467.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.28 : 756.63 = 338.58 : x
  2. Step 2: Convert to fraction form
    548.28/756.63 = 338.58/x
  3. Step 3: Cross multiply
    548.28x = 756.63 × 338.58
  4. Step 4: Simplify right side
    548.28x = 256,179.79
  5. Step 5: Solve for x
    x = 256,179.79/548.28
  6. Step 6: Final answer
    x = 467.24

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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.