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Finding the Fourth Proportional to 548.80, 822.30 and 516.40

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Solution

The fourth proportional to 548.80, 822.30 and 516.40 is: 773.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.80 : 822.30 = 516.40 : x
  2. Step 2: Convert to fraction form
    548.80/822.30 = 516.40/x
  3. Step 3: Cross multiply
    548.80x = 822.30 × 516.40
  4. Step 4: Simplify right side
    548.80x = 424,635.72
  5. Step 5: Solve for x
    x = 424,635.72/548.80
  6. Step 6: Final answer
    x = 773.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.