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Finding the Fourth Proportional to 548.45, 822.77 and 274.49

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Solution

The fourth proportional to 548.45, 822.77 and 274.49 is: 411.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.45 : 822.77 = 274.49 : x
  2. Step 2: Convert to fraction form
    548.45/822.77 = 274.49/x
  3. Step 3: Cross multiply
    548.45x = 822.77 × 274.49
  4. Step 4: Simplify right side
    548.45x = 225,842.14
  5. Step 5: Solve for x
    x = 225,842.14/548.45
  6. Step 6: Final answer
    x = 411.78

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Double scale
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Similar ratio
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1.5x scale

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.