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Finding the Fourth Proportional to 1,295.15, 1,942.73 and 321.25

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Solution

The fourth proportional to 1,295.15, 1,942.73 and 321.25 is: 481.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.15 : 1,942.73 = 321.25 : x
  2. Step 2: Convert to fraction form
    1,295.15/1,942.73 = 321.25/x
  3. Step 3: Cross multiply
    1,295.15x = 1,942.73 × 321.25
  4. Step 4: Simplify right side
    1,295.15x = 624,090.69
  5. Step 5: Solve for x
    x = 624,090.69/1,295.15
  6. Step 6: Final answer
    x = 481.87

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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.