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Finding the Fourth Proportional to 547.28, 821.24 and 218.25

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Solution

The fourth proportional to 547.28, 821.24 and 218.25 is: 327.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.28 : 821.24 = 218.25 : x
  2. Step 2: Convert to fraction form
    547.28/821.24 = 218.25/x
  3. Step 3: Cross multiply
    547.28x = 821.24 × 218.25
  4. Step 4: Simplify right side
    547.28x = 179,235.63
  5. Step 5: Solve for x
    x = 179,235.63/547.28
  6. Step 6: Final answer
    x = 327.50

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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.