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Finding the Fourth Proportional to 548.28, 822.68 and 274.40

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Solution

The fourth proportional to 548.28, 822.68 and 274.40 is: 411.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.28 : 822.68 = 274.40 : x
  2. Step 2: Convert to fraction form
    548.28/822.68 = 274.40/x
  3. Step 3: Cross multiply
    548.28x = 822.68 × 274.40
  4. Step 4: Simplify right side
    548.28x = 225,743.39
  5. Step 5: Solve for x
    x = 225,743.39/548.28
  6. Step 6: Final answer
    x = 411.73

Related Problems

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Half scale
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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.