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Finding the Fourth Proportional to 816.05, 1,222.23 and 490.73

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Solution

The fourth proportional to 816.05, 1,222.23 and 490.73 is: 734.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.05 : 1,222.23 = 490.73 : x
  2. Step 2: Convert to fraction form
    816.05/1,222.23 = 490.73/x
  3. Step 3: Cross multiply
    816.05x = 1,222.23 × 490.73
  4. Step 4: Simplify right side
    816.05x = 599,784.93
  5. Step 5: Solve for x
    x = 599,784.93/816.05
  6. Step 6: Final answer
    x = 734.99

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Double scale
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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.