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Finding the Fourth Proportional to 548.98, 757.08 and 494.31

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Solution

The fourth proportional to 548.98, 757.08 and 494.31 is: 681.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.98 : 757.08 = 494.31 : x
  2. Step 2: Convert to fraction form
    548.98/757.08 = 494.31/x
  3. Step 3: Cross multiply
    548.98x = 757.08 × 494.31
  4. Step 4: Simplify right side
    548.98x = 374,232.21
  5. Step 5: Solve for x
    x = 374,232.21/548.98
  6. Step 6: Final answer
    x = 681.69

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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.