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Finding the Fourth Proportional to 548.28, 822.84 and 403.56

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Solution

The fourth proportional to 548.28, 822.84 and 403.56 is: 605.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.28 : 822.84 = 403.56 : x
  2. Step 2: Convert to fraction form
    548.28/822.84 = 403.56/x
  3. Step 3: Cross multiply
    548.28x = 822.84 × 403.56
  4. Step 4: Simplify right side
    548.28x = 332,065.31
  5. Step 5: Solve for x
    x = 332,065.31/548.28
  6. Step 6: Final answer
    x = 605.65

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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.