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Finding the Fourth Proportional to 638.44, 957.22 and 273.12

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Solution

The fourth proportional to 638.44, 957.22 and 273.12 is: 409.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.44 : 957.22 = 273.12 : x
  2. Step 2: Convert to fraction form
    638.44/957.22 = 273.12/x
  3. Step 3: Cross multiply
    638.44x = 957.22 × 273.12
  4. Step 4: Simplify right side
    638.44x = 261,435.93
  5. Step 5: Solve for x
    x = 261,435.93/638.44
  6. Step 6: Final answer
    x = 409.49

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Double scale
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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.