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Finding the Fourth Proportional to 548.70, 822.21 and 274.47

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Solution

The fourth proportional to 548.70, 822.21 and 274.47 is: 411.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.70 : 822.21 = 274.47 : x
  2. Step 2: Convert to fraction form
    548.70/822.21 = 274.47/x
  3. Step 3: Cross multiply
    548.70x = 822.21 × 274.47
  4. Step 4: Simplify right side
    548.70x = 225,671.98
  5. Step 5: Solve for x
    x = 225,671.98/548.70
  6. Step 6: Final answer
    x = 411.28

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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.