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Finding the Fourth Proportional to 547.94, 821.79 and 274.20

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Solution

The fourth proportional to 547.94, 821.79 and 274.20 is: 411.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.94 : 821.79 = 274.20 : x
  2. Step 2: Convert to fraction form
    547.94/821.79 = 274.20/x
  3. Step 3: Cross multiply
    547.94x = 821.79 × 274.20
  4. Step 4: Simplify right side
    547.94x = 225,334.82
  5. Step 5: Solve for x
    x = 225,334.82/547.94
  6. Step 6: Final answer
    x = 411.24

Related Problems

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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.