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Finding the Fourth Proportional to 548.91, 757.62 and 328.05

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Solution

The fourth proportional to 548.91, 757.62 and 328.05 is: 452.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.91 : 757.62 = 328.05 : x
  2. Step 2: Convert to fraction form
    548.91/757.62 = 328.05/x
  3. Step 3: Cross multiply
    548.91x = 757.62 × 328.05
  4. Step 4: Simplify right side
    548.91x = 248,537.24
  5. Step 5: Solve for x
    x = 248,537.24/548.91
  6. Step 6: Final answer
    x = 452.78

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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.