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Finding the Fourth Proportional to 547.28, 821.18 and 273.40

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Solution

The fourth proportional to 547.28, 821.18 and 273.40 is: 410.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.28 : 821.18 = 273.40 : x
  2. Step 2: Convert to fraction form
    547.28/821.18 = 273.40/x
  3. Step 3: Cross multiply
    547.28x = 821.18 × 273.40
  4. Step 4: Simplify right side
    547.28x = 224,510.61
  5. Step 5: Solve for x
    x = 224,510.61/547.28
  6. Step 6: Final answer
    x = 410.23

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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.