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Finding the Fourth Proportional to 1,450.28, 2,174.78 and 681

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Solution

The fourth proportional to 1,450.28, 2,174.78 and 681 is: 1,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,450.28 : 2,174.78 = 681 : x
  2. Step 2: Convert to fraction form
    1,450.28/2,174.78 = 681/x
  3. Step 3: Cross multiply
    1,450.28x = 2,174.78 × 681
  4. Step 4: Simplify right side
    1,450.28x = 1,481,025.18
  5. Step 5: Solve for x
    x = 1,481,025.18/1,450.28
  6. Step 6: Final answer
    x = 1,021.20

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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.