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Finding the Fourth Proportional to 548.73, 757.17 and 315.81

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Solution

The fourth proportional to 548.73, 757.17 and 315.81 is: 435.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.73 : 757.17 = 315.81 : x
  2. Step 2: Convert to fraction form
    548.73/757.17 = 315.81/x
  3. Step 3: Cross multiply
    548.73x = 757.17 × 315.81
  4. Step 4: Simplify right side
    548.73x = 239,120.28
  5. Step 5: Solve for x
    x = 239,120.28/548.73
  6. Step 6: Final answer
    x = 435.77

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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.