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Finding the Fourth Proportional to 548.03, 821.12 and 331.16

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Solution

The fourth proportional to 548.03, 821.12 and 331.16 is: 496.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.03 : 821.12 = 331.16 : x
  2. Step 2: Convert to fraction form
    548.03/821.12 = 331.16/x
  3. Step 3: Cross multiply
    548.03x = 821.12 × 331.16
  4. Step 4: Simplify right side
    548.03x = 271,922.10
  5. Step 5: Solve for x
    x = 271,922.10/548.03
  6. Step 6: Final answer
    x = 496.18

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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.