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Finding the Fourth Proportional to 548.28, 822.78 and 206.28

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Solution

The fourth proportional to 548.28, 822.78 and 206.28 is: 309.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.28 : 822.78 = 206.28 : x
  2. Step 2: Convert to fraction form
    548.28/822.78 = 206.28/x
  3. Step 3: Cross multiply
    548.28x = 822.78 × 206.28
  4. Step 4: Simplify right side
    548.28x = 169,723.06
  5. Step 5: Solve for x
    x = 169,723.06/548.28
  6. Step 6: Final answer
    x = 309.56

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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.