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Finding the Fourth Proportional to 548.96, 757.28 and 315.95

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Solution

The fourth proportional to 548.96, 757.28 and 315.95 is: 435.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.96 : 757.28 = 315.95 : x
  2. Step 2: Convert to fraction form
    548.96/757.28 = 315.95/x
  3. Step 3: Cross multiply
    548.96x = 757.28 × 315.95
  4. Step 4: Simplify right side
    548.96x = 239,257.25
  5. Step 5: Solve for x
    x = 239,257.25/548.96
  6. Step 6: Final answer
    x = 435.84

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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.