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Finding the Fourth Proportional to 547.42, 821.28 and 273.18

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Solution

The fourth proportional to 547.42, 821.28 and 273.18 is: 409.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.42 : 821.28 = 273.18 : x
  2. Step 2: Convert to fraction form
    547.42/821.28 = 273.18/x
  3. Step 3: Cross multiply
    547.42x = 821.28 × 273.18
  4. Step 4: Simplify right side
    547.42x = 224,357.27
  5. Step 5: Solve for x
    x = 224,357.27/547.42
  6. Step 6: Final answer
    x = 409.84

Related Problems

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Double scale
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Similar ratio
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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.