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Finding the Fourth Proportional to 548.15, 822.23 and 163.40

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Solution

The fourth proportional to 548.15, 822.23 and 163.40 is: 245.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.15 : 822.23 = 163.40 : x
  2. Step 2: Convert to fraction form
    548.15/822.23 = 163.40/x
  3. Step 3: Cross multiply
    548.15x = 822.23 × 163.40
  4. Step 4: Simplify right side
    548.15x = 134,352.38
  5. Step 5: Solve for x
    x = 134,352.38/548.15
  6. Step 6: Final answer
    x = 245.10

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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.