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Finding the Fourth Proportional to 548.82, 757.35 and 315.95

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Solution

The fourth proportional to 548.82, 757.35 and 315.95 is: 435.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.82 : 757.35 = 315.95 : x
  2. Step 2: Convert to fraction form
    548.82/757.35 = 315.95/x
  3. Step 3: Cross multiply
    548.82x = 757.35 × 315.95
  4. Step 4: Simplify right side
    548.82x = 239,280.95
  5. Step 5: Solve for x
    x = 239,280.95/548.82
  6. Step 6: Final answer
    x = 435.99

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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.